All mentions of RTS/ PRI will hereafter mean The Rolling Thunder Show as members of Promotorport-Raceway- International. In consideration of acceptance by the RTS of the Drivers Licence application and payment of license fees, the signee agrees to abide by all rules and regulations of PRI, as to conduct and mechanical specifications, as now published in the Official PRI Rule  sheet, or hereafter modified. RTS/PRI reserves the right to alter or amend these rules and/or regulations at any time in the interests of safety, cost control and/or fair competition.

It is the responsibility of each competitor to read and fully understand the contents of these rules. If there is a disagreement or dispute regarding the meaning or application of these rules, the interpretation and application of the officials at the track shall prevail. Appeals may be considered by RTS /PRI.

Any rules updates or safety bulletins published by  PRI  for the purpose of implementing, interpreting or enforcing these rules will be deemed as part of and will supersede these rules. The rule updates or safety bulletins will only appear on official RTS/PRI letterheads, or in the official publication of an PRI face book  pages.  The rule updates will also be posted on the Rolling Thunder Show and Promotasport Raceway International  websites.

The rules and regulations set forth herein are designed to provide orderly conduct for PRI events and to establish minimum acceptable standards and requirements for such events. These rules and regulations shall govern the conditions of all PRI promoted events, unless otherwise noted. All members are required to comply with these rules.  No express or implied warranty of safety shall result from publication of, or compliance with these rules and regulations. They are intended as a guide for the conduct of the sport and are in no way a guarantee against injury to participants, spectators, or others. No pretense is made for having designed a foolproof set of rules and regulations. The spirit and intent of these rules is the standard by which PRI promoted racing is guided. Race Scrutineers are authorised to decide if an equipment change is an attempt to circumvent these rules.  Officials can and will disqualify an entry in violation of the spirit and intent of these rules. Since it is impossible to anticipate every potential circumstance, a PRI scrutineer or official shall have the right to initiate action correcting a hazardous condition or a condition not in compliance with the spirit and intent of these regulations.  Decisions are to be based on “common sense”, consistency, impartiality and fair play. Developments in racing may necessitate changes that we cannot anticipate at the time the rules were written.

If this rulebook does not specifically say that you can change, modify, add something, then you must consider that the change, modification, addition is illegal. Any questions about the legality of a change not covered in this rule book, must be answered by PRI officials and that decision is final.


All competitors must possess a valid PRI licence in order to be permitted to compete in any PRI meeting. Without a driver’s licence in their possession, that competitor may be denied participation in that PRI event, unless they receive prior approval directly from PRI in writing, or when they sign in at the meeting.

If a driver’s licence is lost, please contact PRI immediately and a replacement card will be issued for a fee of £10.00.

Application forms for an PRI licence may be obtained from PRI web site,  Licence application forms must be fully executed, signed by the applicant, and accompanied by the appropriate fees. The mere acceptance of an PRI licence application form does not constitute the issuance of or approval by PRI of such application.  PRI may deny membership to any applicant for any reason.  All applicants will be advised in writing by PRI whether their application for PRI membership has been approved.

All memberships are in effect as of the date of issue and are on a calendar year basis beginning January 1 and expiring December 31 of that year unless otherwise noted.

All PRI members, associate members and participants should fully understand that participation in any PRI formula, exposes them to risks of death, or serious bodily injury.  The PRI members, associate members and participants voluntarily assume these risks.

Each participant in competition has the responsibility to assess the safety aspects of facilities, including the racing surface, and assume the risk of competition. A participant’s concerns should be brought to the attention of the Race Director or Clerk of the Course at that event before he / she competes in any on-track activity.


PRI welcomes visiting drivers to any of its meetings. Any driver not possessing a valid RTS/PRI  licence, will be considered a visitor and payment for that race meeting entry will include the issue of a day licence for that event only. Each visitor’s name and car number will be recorded upon entry.  All visiting drivers have to accept current rules and their cars will be scruiteneered and assessed for inclusion into an appropriate formula for that meeting.  No points will be awarded to day licence holders.


The penalty for falsification of PRI licences or pass cards, loan of the licence or pass card to another party, participation under a fraudulent use of credentials, including loaning of a licence or pass card  for gaining access to an PRI meeting, could be cause for suspension of their membership for a minimum of one (1) year.


It shall be the personal responsibility of all participants to refrain from taking part in any PRI event if they have been injured, are under the influence of alcohol or any controlled substance, or are in any way other than medically fit. PRI may deny membership of a person based on past medical conditions that may affect the safety of that person or other participants at an RTS meeting. It is the personal responsibility of all participants to report any injuries suffered at an PRI event to the  medical centre BEFORE leaving the race tack.


PRI members, associate members and all participants at PRI events are expected, at all times, to conduct themselves in a professional and non-disruptive manner. Any member, associate member or participant who within the boundaries of the race track facility, in the sole and absolute judgment of the PRI verbally or physically threatens or assaults another participant, official or other person Uses bullying behavior to another driver uses vulgar or derogatory language engages in unsportsmanlike like conduct or conduct detrimental to the PRI or otherwise creates a condition or circumstance which is unsafe, unfair or out of order will be deemed by the PRI to have violated the rules and regulations and will be penalized by the PRI Board of Control, and / or Steward, and / or Clerk of the course accordingly.

Drivers (or their designated parent or guardian if the driver is under 16 years of age) are reminded that they are responsible for the conduct of their team members or associated with their team. A driver may suffer the penalties for the conduct of their team or associates. For those that violate these rules and regulations, PRI may take action ranging from probation to expulsion.


Licences are issued annually, and are renewable in January of each year, Licences are only issued to persons aged 16 years and over. Juniors must have guardian’s written consent.

Unless special approval is granted, all drivers must be free from permanent or occasional disability and have full use of both hands and feet. Good eyesight, with spectacles if appropriate, is also required, and drivers are asked to declare any colour vision deficiency.

Drivers granted a licence are bound by PRI  Rules and Regulations, and any supplementary regulations, verbal or written, which may apply specifically at any venue or in any special event.

 A separate licence is required for each formula and a separate racing number will be issued for each formula.  Where possible, this number will be the same for each formula.


The Points System is subject to annual review. Points are scored only at meetings published on the official fixture list which is issued in January of each year.  An annual Points Championship for each formula with trophies for the top three drivers provides all season interest.

The points system in use for this season is as follows:

All Heats                      8,7,6,5,4,3,2,1 pts

Finals               16,14,12,10,8,6,4,2 pts

Special event with One Winner: 10 pts

Major Championship Finals such as World Cup Finals, British Finals or European Championship Finals no points:


A drivers grade will be identified by either WHITE ,YELLOW, BLUE, RED or Superstar  painted roof,  covering at least 90% of the available roof.

A driver who wins two events at any one meeting is automatically upgraded to the next highest grade.

In most events drivers will start in grade order, WHITE at the front, followed by YELLOW, BLUE, RED in that order. Reigning Champions line up at the back of the grid. For some special events the grid order may be varied.

Silver – reigning PRI points Champion.

Black and White Chequer - British Champion.

Gold Roof  - World Cup winner.

A driver who currently holds more than one title is entitled to elect to use only one star colour or an unambiguous combination.

Any driver graded RED or above at any time in his racing career, can never be down-graded below YELLOW in any formula in any subsequent season. 

A driver who wins two events at any one meeting is automatically upgraded to the next highest grade. 

The number of drivers in each grade is normally determined by the number of points scored as follows:-

Drivers with the highest points –RED

All drivers with not less than 75% of the highest total – RED

Driver’s with the next highest total –BLUE

All drivers with not less than 60% of the total at (c) – BLUE

Drivers with the next highest total – YELLOW

All drivers with not less 45% of the highest total at (e) –YELLOW

All other drivers are WHITE (but see also clause 11 onwards below).

In most events drivers will start in points grade order, WHITE at the front, followed by YELLOW, BLUE, RED in that order. Reigning Champions line up at the back of the grid. For some special events the grid order may be varied.

 Any driver graded RED or above at any time in his racing career, can never be down-graded below YELLOW in any formula in any subsequent season. 

Grids are set out as follows;...
Top points scorer.
Reds line up in points order.
Blues line up in points order
Yellows line up in points order.
Day licence holders to the rear of Champions.


A full protection helmet must be the minimum specification as published by PRI

All flag, radio commands and light signals must be obeyed immediately. 

Drivers who appear to have indulged in the intake of alcohol or drugs will be excluded from racing.  Smoking is not permitted in cars or on the track at any time. 

No passengers are allowed in or on the car. 

Drivers abandoning a vehicle while a race is in progress must retire immediately to a recognised safety area whilst keeping there safety helmet on. 

It is an offence to put, or attempt to put, an overturned car back onto its wheels during a race, and drivers are not allowed to re-enter a car once they have left it.  Repairs are not permitted on the circuit and cars must not be pushed or handled in any way during a race. 

Team tactics in the individual events will be subject to penalty the decision of the Stewards is final. 

In all events, cars which are stationary for more than 60 seconds may be subject to disqualification. 


Events may be clutch starts or rolling starts over any distance or time limit determined by the Promoter.

Before joining the circuit, a driver must be wearing his helmet and be securely strapped into the car.  Drivers should then take up their starting positions as directed by their grades.

After the final event, the winner, second and third should complete one extra lap and then pull up at the infield receive their awards.

A race which is stopped before one quarter of the distance will be declared void and rerun.  A race which is stopped after three quarters of the distance will be considered complete, and the final placings will be those existing at the completion of the previous lap before the Red flag was shown.

A race which is stopped between one quarter and three quarters of the distance must be allowed to continue whenever possible.  Positions in the restart will be those existing immediately before the stoppage; the restart will be in single file, and drivers who leave their cars before or during the stoppage will be excluded from the restarted event.

In all events, cars which are stationary for more than 60 seconds may be subject to disqualification.

In all events, a BLACK flag is used to indicate to a driver that he is disqualified.  He must immediately withdraw from the race.

A BLACK cross means you may be penalised keep racing. 

A driver losing a wheel or suffering a flat tyre will be flagged off by the Clerk of the Course, Starter or Steward. 


All drivers, Promoters and Officials licensed by PRI are subject to the Rules and Regulations contained in this book, and if found to be guilty of a breach of these regulations, shall be subject to penalty as determined by the PRI board of control.

A driver who wishes to complain about the conduct of any driver or official may appeal to the PRI board of control with a statutory fee of £30. Which must accompany the written complaint A driver may NOT complain about the decisions of any official.

Protests or complaints must be in writing and received within 7 days of the meeting, complete with the statutory fee as appropriate.

Complaints or protests about the results of races must be delivered to the racing director within 2 minutes of the end of the meeting.  Such protests will be dealt with by the Race Director who, after consultation with the lap scorers and other officials, is empowered to amend the results of the meeting.  Such amendments can only be made within 30 minutes of the end of the meeting, and all affected parties must be present and be advised of the amended results.

Where a driver wishes to complain or protest about the preparation of a car, or a violation of specification, such complaint must be delivered in person to the Steward of the Meeting together with the special protest fee of £100. for each item of complaint, within two minutes of the end of a meeting, this will cause the Steward to order the offending car to be subject to immediate further check by the Scrutineer on the specific items complained of.

In cases where the specification protest is valid, the fee will be returned in full to the complaining driver, and the offending driver will be penalised as allowed by these regulations.

In cases where the protest is found to be not justified, all or part of the fee may be awarded to the driver against whom the protest was made.
The Promoter, Steward or the Clerk of the Course at any specific meeting, have the right to suspend or disqualify any driver pending the next board of control meeting.

Persons who feel they have been unjustly dealt with by any of the Disciplinary Bodies, have the right of appeal to the next highest body PRI /ORC  Appeals with the necessary new evidence must be received by the RTS Office within 14 days of the judgment appealed against.

Drivers should be aware that an appeal could lead to one of three alternatives:

(a) confirmation of the original findings, (b) reduction of the punishment ©  increase of the original punishment plus a bill for costs.

The Appeal fee is £100.   






  1. Definition:

  2. To provide children aged from 6 to 11years of age (they must retire from the formula on the date of their 11TH birthday) an entry into short circuit motor racing.

  3. It is primarily a MSA go kart chassis based formula, but purpose built Ninja Sprint Kart chassis are allowed, Providing the chassis is constructed in accordance with MSA yearbook.

  4. Construction:

  5. It is required that the chassis is constructed from magnetic steel tubing, cross section free. The method of Welding/brazing is free but for all main chassis joins welding/brazing is obligatory - i.e. no clamping, sliding twisting members or torsional adjustments of any kind including bolt-in torsion bars are allowed. The use of any type of hydraulic or similar damping device for any purpose is specifically prohibited. Purpose built Ninja Kart's must be constructed using 28 mm or 32mm O/D tube with min wall thickness of 2mm, with symmetrical pivot/steering pick up points steelwork/components with no KPI adjustments. It is not permitted to run any off-set front or back.

  6. The wheel lift when the car is placed on full lock must be identical on both sides +/- 5mm.

  7. The floor pan must be complete in the driver’s compartment, that will be including the waistline profile of the chassis meeting the side bodywork, all floor pan material must be made out of alloy with min thickness 1.5, and max 2mm; a 50mm hole must be cut in the floor pan underneath the centre of the seat to facilitate the checking of the thickness by the scrutineer

  8. The Drivers lower body must be covered by the body panels (no open sides). The Left side v opening which is allowed for entry must be a minimum of 14” from the bottom of the chassis to the top of the Opening and must be covered the bar across must be 25mm o/d tube.

All Body panels must be made of alloy with a min thickness of 1mm

  1. The driver’s seat must be a full containment type and must be positioned centrally in the car with strict attention being paid to its correct fitment, as set out by the manufacturer.

No part of the driver’s seat must be below the bottom of the chassis

  1. Axles. Axle carriers must be symmetrical both sides no off set, Axles have to be 30mm hollow or solid type, The maximum overall track of the rear axle must be no greater than 1320mm (52”) measured from outside of tyre to outside of tyre. The rear axle alignment will be measured from the inner edge of the rear wheel rim to the edge of the chassis rail which must be equal on each side. Front Stub axles must be a Minimum of 10mm back from the outside of the wheel rim not the tyre, Hollow stub axles are not allowed, scrutineers are advised to reject any car that has them fitted.

  2. Front bumper must be flat vertical surface type and cover front wheels to stop wheel contact. The rear wheels must be protected from rear impact by a single hoop attached to the main chassis rail and roll cage and must cover the full extent of the rear wheels.

  3. The driver’s feet (when pedals are depressed) MUST be a minimum of 12” (300mm) back from the front of the bumper.

  4. The Engine. must be positioned centrally in the car behind the drive axle plus or minus 50mm, the engine Clamping tubes must be no higher than 64mm above the main frame, measured from the underside of the Main frame to the top side of the clamping tube, you must use the standard Honda gx160 type mounting clamps and frame.

  5. The roll cage. must be constructed in such a manner that the driver is protected from side and head impact, minimum size tubing in the roll cage is 25mm/o/d x 3.0mm and must consist of four posts two hoops joined together with 5 cross bars, with both the front braces running from the front upright bars of the roll cage down to the outer front part of the main chassis, the rear uppermost cross bar must be straight can be placed no further back than the spring point of the rear roll cage hoop, and must be in line with the base of the wing when projected upwards at 90%, the intention is the wing base must cover the aperture above the drivers head at all times. The minimum height of the roll-cage must be 813mm (32”) from the bottom of the chassis to the lowest point of the top of the roll cage, whilst maintaining a minimum of a 100mm (4”) clearance between the top of the child’s crash helmet and the top and/or any part of the roll-cage. The hailo will no longer be factored into this measurement and should be removed, The rollcage must be welded to the main chassis. The Cross bars joining the roll cage are to be 25mm o/d x 3.0mm and fitted: one just above the rear pod, one at rear of roof. One at front of roof, one at steering column height, one at front bumper height. “Note “all welds must be complete, A diagonal safety bar 25mm o/d x 20mm must be fitted (off side) on side of roll cage running from the steering support cross bar to terminate in front of the drivers seat , the diagonal bar must be welded at both ends, as per roll cage rules.

  1. You must use the go kart plastic side pods and front bumper, in addition a roof wing and rear engine pod must be used in the construction of your Ninja Sprint Kart.

The only holes allowed in rear pod are for exhaust and pull cord, it’s the scrutineers discretion if the hole’s are a suitable size or to big there word is final.

  1. The roof wing. must be of similar design to a Sprint Car, and must be fitted directly above the drivers head, it must be hinged at the rear of the roof with a second fixing fitted at the front, the wing must cover the entire aperture above the drivers head, it must measure a minimum 28˝ x 35 max ˝body, with side plates of 8.5˝ x 32maximum and 16” x 32”maximum. The side plates of the wing MUST not be below the roll cage at any point. The scrutineer will pass a rod through the roll cage, from front to rear and this must not touch any part of the wing. Full access to the roll cage tubing must be achieved. The rear of the wing must be level with the centre of the rear axle

  2. Minimum weight of ready to race Ninja Sprint Kart must be 105 kg (without driver). Car must make the 105 kg weight without refuelling after a race. (Regular weight checks will be carried out). Ballasting of any type is not permitted. Achieving the weight rule is the parent’s responsibility.

  3. Do not attempt the above construction if you have concerns as to your welding and construction ability, your child’s safety will depend on your skills.

Due to the scrutineer not being able to determine if a chassis has been repaired using a slip tube Technique or a deliberate attempt to provide the chassis with flex, such type of repairs is not Allowed, should the chassis be damaged to the extent it needs that type of repair then the chassis has come to the end of its use and needs replacing.

19. Safety Equipment.

20. You must use a 5 point Ninja Sprint Kart type safety harness. Close attention to the manufactures Fitting and maintenance instructions must be observed at all times.

21. Neck Brace, round type only allowed, no u shaped brace are allowed, Fire retardant gloves, overalls and a balaclava must be worn, a head/ neck restraint System is highly recommended.

22. A high back full containment type seat must be fitted. The top headrest of the seat must be fully supported by a steel loop or bars to prevent any rearward collapse of the upper part of the seat– this may be adjustable using the minimum of 8mm bolts but must be secure at all times.

23. A Window net must be fitted to the right-hand (fence) side.

24. A Chain Guard must be fitted.

25. The use of quick release steering wheel hub is recommended.

26. A cut out switch must be fitted and clearly marked ON/OFF and be within easy reach by the driver.

27. Helmets Crash Helmets; the following standard of helmets are permitted: FIA8860-2004,8860-2010, 8859-2015, Snell EA2016, CMR2007, CMS2007, CMR2016, CMS2016, SA2005, SA2010, SA2015,SFI Foundation24.1,31.1,31.1A and 31.2A The E2205 European standard helmet may be used in Fibreglass, Carbon or Ti-Composite form only. It is important that the helmet fits the driver correctly. Shatterproof goggles/visors must be worn; your helmet must display the current ORCi sticker.

28. Drivers must wear flame retardant racing overalls and these must be maintained in a clean and tidy condition and be clearly marked fire proof. N.B. If wet weather clothing is used this must be worn IN ADDITION TO AND NOT INSTEAD OF the regulation overall type clothing as described above.

29. A screen mesh with a max 2” square must be fitted, this may be cable tied in.

30. Mirrors are not allowed to be fitted

31. Tyres

32. Only the Duro Highline HF-242 BI and B2 slick- tyre can be used, these must remain as manufactured and may not be altered in any form, tyre softener, substances or additives are NOT permitted. When the race is declared a “wet race” by officials, then and only may wet tyres be used. The only wet Tyres permitted is the MojoW2 rain tyre set with white, yellow or green barcode UK spec. Rear wheels must be a minimum of 175mm deep, with both wheels being the same depth. Front wheels must be a minimum of 120mm with both wheels being the same depth. No stagger is permitted under any circumstances, the o/d of the left and right must be the same.

33. Grades & Points All promotions run a national monthly grading system, (white, yellow, blue, red & Champions). All drivers must display their current grade; this must be with a 50mm wide x500mm long stripe running along the front edge of their roof wing, champions may fit flashing Lights.

34.  The highest grade achieved no matter what promotion you are registered with you have to start at highest grade all over.

35. Brakes. A single brake is required on the rear axle

36. ENGINES. The only engine eligible for use is the Honda GX160 supplied in sealed form by RPM who’s Contact details are RPM, Parsons Brake Cottage, Parsons Brake, Hanbury, Burton on Trent, DE13 8TN. 01283575566. 07977 430680.

37. You may change the oil and must use the correct amount of oil, replace the one make NGK spark plug NGKBPR6ES with the same type and make, replace the paper airfilter/foam with a standard Honda paper air filter/foam. Any maintenance that requires removal of the seal, the engine must be returned to RPM so the seal can be removed for the maintenance to be carried out, upon completion of the works the engine will be resealed and fresh documents and seal details will be supplied Tand recorder in your log book, it is your responsibility to ensure your scrutineer is aware of the changes, as in the event of an engine check, the scrutineer is advised to reject any engine that bears the incorrect seal number to that assigned to that engine or driver, it is a condition of your entry, you agree to allow the Promoter to swap your engine to that of another competitor for the duration of the meeting, for major championships you will be required to place your spark plus in a container for marking and each driver will be required to draw a plug from the container, that is the plug you must use during the whole event, any changes must be done with the approval of the scrutineer..

38. Max number of engines is two which the engine numbers and seal numbers must be logged in the driver’s licence/logbook. Scrutineers are advised to note the seal number in the drivers log book at all meetings when scrutineering.

39. After scrutineering at all meetings; before changing/removal of the engine you must notify the scrutineer who will take the seal numbers of the engine removed and the new engine fitted in case of any further checks are necessary.

40. Engine Claimer Rules, it is a condition of your entry you agree to sell your engine to a fellow competitor upon a request being made to the scrutineer , the driver will then pay in cash to the scrutineer the full replacement cost of the engine from RPM. To include an admin fee of £10 to cover the cost of arranging the transaction.

41. Axle and Drive Sprocket. Only a 70 tooth 219 pitch rear sprocket and 20 tooth 219 pitch clutch sprocket may be used using a 219 pitch Chain.

42. Clutch. Two clutches are allowed to be used: NoramBE, & Maxtorque SS. both 6 shoe with stainless steel spring. This comes into effect on January 1ST 2018

Clutch must engage at 1900rpm and be fully engaged at 2200 rpm when checked by the scrutineers.

Clutch must remain standard as manufactured.

Product code MT 20219, £45, Contact Gary Rolf, KKC Kart Components


43. Fuel. No additives of any kind may be used; petrol purchased at the roadside pump may only be used. You may not alter the fuel tank in any way.

You must use the approved Ninja Kart petrol tank cover, which is available only from Miller Motorsport and Speedworth fabrications, no other type is permitted

44. The main jet and Emulsion tube fitted in the engine by RPM.
Emulsion tube: PN 16166-Z4M-922 Main jet: 0.695.

NK Points as of 1st March 2020

Heat Races and B Finals

All other Finals

No points will be included for any Championship.

World Final Qualifying

Top 10 Superstar, Red, Blue, and Yellow graded drivers in the NK National points Championship running from world final to world final plus top 2 from Aldershot Birmingham, Lydden, Locgelly, Ireland and Swaffham .

English Open, National Open, European Open, British Open rotates between the 5 tracks. the Irish Open, the Scottish Open and the World Final are static events.









 PRI 1200 Rod

1)   TYPE  OF  CAR

A; Any four-seater, front-engined up to 1200cc, saloon ,coupe or hatchback, constructed of steel.

B; Body shells must retain their original silhouette.

C; Each driver is permitted one car per meeting & each car is permitted one driver per meeting. And that combination of car & driver will be the one presented at scrutineering. 


A; The body must not be altered in any way and must remain standard.

B; No fibreglass or Kevlar panels allowed.

C; All panels must be steel.

D; Bonnets must be secured by two extra over-centre clips, if hinges discarded, then corner plates must be used.

E; Doors must not be bolted or welded shut.

F; The external paintwork must be of professional appearance at all times, and race damage must be repaired.

G; No roof aerofoils or spoilers.

H; No side skirts or wheel arches allowed, unless as fitted as standard by manufacturer.


The drivers racing number must appear on both sides of the car. The numbers should be a minimum of 300mm high x 50mm wide, black numbers on a white background only. All cars must have a roof fin fitted above the gutter line of the vehicle i.e. not to the side of the car. This fin must be white and be large enough to carry solid black number a minimum of 8" (200mm) high and 2" (50mm) minimum width. It is the drivers responsibility to ensure that their numbers can be seen clearly to enable them to be lap scored.

Weight Limit 680 KG 


A; Any 4 cylinder, 8 valve, in-line engine, with a maximum capacity of 1400cc, using the original stroke plus 1mm oversize.

B; You may use any engine in the manufacturers range, provided it fits without making any alterations to the engine bay or bulkhead.

C; The engine must remain standard as fitted by the manufacturer. you may mix and match engine parts but if you are unsure please check.

D; No modifications are allowed to the engine. No homologation parts are to be fitted.

E; Standard cast exhaust manifolds and exhaust systems, as fitted by manufacturer, with a minimum of one silencer must be used. (No after-market silencers are permitted)

F; Only standard single carburettor, as originally fitted by manufacturer may be used,  Either the original or an after-market air filter MUST be fitted,  you may use either vacuum or spring  to open the secondary choke.

G.  You may not lighten the  flywheel, must remain standard as manufactured. You are allowed to modify engine block to take standard small Vauxhall flywheel.


A; A minimum of four posts / two hoops joined together, in addition there must be two chicken bars on the driver’s side and one on the passenger side, minimum of 1½” x 10 swg OD tube. one bar connecting the front hoop and the rear hoop central in the car.

B; Alloy roll cages are not permitted.

C; No part of the roll-cage shall go through the bulkhead, ie: No strut bracing is permitted.


A; Both must remain standard as fitted by the manufacturer that includes the drive shafts.

B; No Welded differentials are allowed. 


Must be effective on all four wheels. Bias braking is not permitted. 


A) N/S/F Shock Absorbers;

1: You may use a  Standard Replacement unit oil or Gas;

2: The shock absorber must not be altered/modified in anyway. Also the manufacturer’s part number, which is stamped on the unit, must not be removed/defaced/altered.

3: All shock absorbers must not have anything added to, i.e: spring assistors, gators. The complete shaft must be fully visible AT ALL TIMES.

4: Must remain in original position as fitted by manufacturer.

B) O/S/F and Rear Shock Absorbers;

Must be standard as originally fitted by the manufacturer. No up-rated replacements may be used. They must be fitted in their original positions. All shock absorbers must have nothing added to them, i.e: spring assistors, gators, etc. The complete shaft must be fully visible.  

C) Springs;

1: Spring poundage is free.

2: You may use a 2 1/4 od on front and rear.

3: No packing of the spring is permitted.

4: A maximum of 25mm/1” difference in height is permitted between the two front springs, when not in compression. Same rule applies to torsion bar cars, the passenger side ride height must at all times be within 25mm/1” of manufactures settings.

5: The cutting and welding of springs is not permitted, you may not modify the torsion bars, you may fit replacements as approved by the manufacturer.

6: Springs must be retained by either; wiring, cable ties or clips. 

D) Camber and Castor;

1: A maximum of 25mm/1” negative camber is permitted on the N/S/F only. This will be measured on the wheel rim. But not by altering the top fixing of the shock absorber unit.  the max amount of stagger caster allowed is 40mm taking both N/S and O/S measurements  into account.

2: No additional  Positive or  Negative camber is allowed on any other wheels.


A; Alloy or steel wheels may be used, up to a maximum of 14” & 6J wide.

B; Any road legal tyre is permitted, slicks or semi slicks are not allowed.

C; The same off-set wheels must be used on the same axle.

D; No Yokohamas, Kingpins, any Sportway, ‘Chunky/Block’ tread pattern, mud, snow, town and country competition type/trackday tyres are allowed, NO WINTER TYRES AND NO TYRES WITH EXCESSIVE SIPES are allowed under any circumstances .                                                       


A; All glass must be removed. Laminated screens front and rear can remain

B: A metal upright, to a maximum of 38mm, a minimum of 19mm, box or tube, must be welded or bolted to the centre of the front windscreen aperture, this is compulsory. 


Either two stop/brake lights (minimum of 762mm (30”) apart), or a centrally fitted single stop/brake strip-light, must be fitted onto the parcel shelf, or hung from the roof in hatchbacks. Lamps must be operated by the standard switch as fitted to the car. Bulbs must be 21 watts. Vauxhall Corsa ‘C’ models may use the original brake light cluster but they MUST be covered in a clear self-adhesive cover.


A; Battery may be fitted in original position, but must have an additional clamp fitted, and covered with a rot-proof material, if they are not a sealed type.

B; A battery master switch must be fitted in the area of the rear passenger side window, and must be clearly marked “ON/OFF”.


A; All fuel tanks must be securely fixed, metal straps or bolted.

B; A maximum of two gallons capacity is permitted.

C; Fuel tanks, including filler caps, must be covered by a metal firewall.

D; The fuel outlet must be from the top of the tank and  and the over flow must be fitted  a non return valve.

E; All fuel pipes must be inside the car.

F; Fuel lines must be metal or metal covered, no rubber fuel lines are permitted.

G; A fuel shut-off tap must be fitted within easy reach of the driver and must be clearly marked On - Off.

F. Fuel pumps must be either fitted under the bonnet or in the sealed area surrounding the Fuel Tank


All cars must display their current grade, with a minimum of 90% of the available roof if the incorrect colour is shown you will race from the next grade up until its correct. All championship winners must have a minimum of 50% of their roof displaying the correct roof colour of the championship (see below). 

Points Champion and British Champion are SUPERSTAR grade and must start at the rear of the grid.  


British Champion Black & White Chequered with flashing lights
World Cup Winner Gold Roof
Points Champion Silver with flashing lights
Current Points Leader Red with Silver Stripe
Normal Grades Red, Blue, Yellow & White




Any car built to F2 or Superstox rules,.

The following Safety Regulations will apply without exception:-

A solid floor must be installed in the driver’s compartment (cab). The cab floor must extend rearwards beyond the front edge of the drivers seat (behind the drivers Knees).

A vertical side protection plate of 3mm thickness steel must be welded between the main (top) and lower chassis rails to cover the entire side area of the drivers foot well on both sides of the car. A head rest must be fitted behind the drivers seat with a 3mm plate minimum thickness of 3mm x 6inch square.

A rectangular steel plate must be bolted to the base of the seat or welded to the chassis directly under the seat to protect the driver from the rear axle, differential and prop shaft. A steel hoop must be fitted around the prop shaft attached to seat plate designed to catch the prop shaft in the event of breakage.

Fuel tanks fitted outside of the main chassis rails must be constructed of steel or aluminium with a minimum 2mm wall thickness. The filler cap must be of a metal threaded screw type. The fuel tank Must have a breather pipe that prevents spillage in case of inversion. A one way valve must be fitted to breather, The fuel feed pipe must enter the tank at the top. The fuel tank must be securely fitted and must be protected from intrusion by an additional single steel plate or steel tubes. The tank must be positioned next to the chassis rail/ steel side plate with no gap between. Fuel tanks fitted behind the driver within the chassis rails may be of Aluminium providing that a steel plate is fitted to the rear of the car (minimum 3mm thickness) and that a securely fitted firewall is in place.

Fuel lines must be of metal or steel braided fuel hose.

Any F2 or Superstox aerofoils is permitted.

You may use any tyre up to 10” wide wets or dry.

The following engines are permitted for use:-

The Ford 2 litre SOHC NE type engine (FORD PINTO).

The Ford 2.0 Zetec engine black top.

Engines may be modified as per the Technical Regulations for either F 2 or Superstox. In the event of your engine is being sealed for inspection, you will be required to state which regulation you engine complies to.

Only the Weber 32/36 DGV or DGVA carburettor may be used with maximum sized chokes of 26mm and 27 mm.

Gear box is free. Differentials are free.




PRI Mini Rod




 You may use any BMW Mini fitted with a 1600CC engine but excluding the Cooper s engine.


Body shells must retain their original silhouette.

The body must not be altered in any way and must remain standard.

Doors must not be bolted or welded shut.

The external paintwork must be of professional appearance at all times.

Roof aerofoil’s and spoilers are permitted.

No side skirts or wheel arches allowed, unless  fitted as standard by the manufacturer.

Bonnets must be secured by two extra over-centre clips or straps


You are only permitted to use the standard unmodified 1600cc BMW Mini Cooper Engine and Gearbox,. The engine must remain standard as fitted by the manufacturer. You are ONLY allowed to remove the air con equipment that is it .

No modifications are allowed to the engine. No homologation parts are to be fitted.

Standard t exhaust manifolds and as fitted by manufacturer, you car at all times must comply with the Lydden strict noise limits, we suggest this is best achieved using a minimum of 2 silencer.


 Minimum of  a single hoop  behind the drivers head  with a seat  supporting cross  bar joining the legs of the hoop  with 2 reward stay bars  terminating  at the spring turrets, in addition there must be two chicken bars on the driver’s side, minimum of 1½” x 10 swg OD tube. no skinning or lightening the shell  is permitted.

 No part of the roll-cage shall go through the bulkhead, ie: No strut bracing is permitted.


Must remain standard, only standard replacements parts may be fitted. the hand brake to be operational at all times.


No modifications are permitted to any part of the suspension, if fitting replacement parts they must carry the same silhouette as the original.


Spring poundage is free but must carry the the same silhouette as the original..

A maximum of 25mm/1” difference in height is permitted between the two front springs, when not in compression. 


Any; Standard  wheels can be fitted for as long as they no wider than those fitted as standard to the car.

Any road legal tyre is permitted, track day tyres are permitted. The same off-set and diameter wheels must be used on the same axle.


You must retain all the windows, both the drivers and passengers windows must function as manufactured.


All lights must be fully operational.


Battery must remain in the original position.

A battery master switch or pull cord must be fitted in the windscreen nearside scuttle area which must be clearly marked “ON/OFF”


All fuel tanks pipes and pump must remain as standard and unmodified in every aspect.

A maximum of two gallons only capacity is permitted.


The drivers racing number must appear on both sides of the car. The numbers should be a minimum of 300mm high x 50mm wide, black numbers on a white background only. it is helpful for the lap scorers to have a large number on the left hand rear side of the roof.