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Streetstock 125
Engine capacity
Maximum 125cc/Minimum 120cc OE engine
The use of superchargers/turbochargers is prohibited
Engine type
Only four stroke OE homologated road engines.
No competition engines
Fuelling
Air filter and box may be changed or removed.
Original OE Fuel Injection to remain as fitted from manufacturer
All air-cooled engines have “NO” carb size restrictions
Only OE supplied ECU/CDI permitted (Euro/USA/UK all models ECU/CDI permitted) NO altered or race ECU/CDI
Any carb “UPTO” standard OE diameter permitted on water-cooled carb engines
Jets/needles/tubes may be changed on carburettors
Fuel mapping plug in boxes eg. power commanders/resistors/ignition boxes can be fitted but standard OE ECU/CDI must still be used
Exhaust maybe modified or replaced
Engine Tuning not permitted and must remain OE standard with no internal modifications at all
Starter motors if originally fitted must remain and be functional
No modification to the timing of the engines ignition pick-up or flywheel allowed.
Cutting of the ignition/fueling for the purpose of changing gears is allowed by a quickshifter mechanism
Chassis
Seat subframe may be modified/changed
No home made or one off or competition frames
Suspension
The forks must remain standard OE, any internal modifications are allowed , external preload adjusters allowed.
You can use “ANY” forks fitted to the same make/model of bike irrespective of year eg YZF-125 any year YZF-r125 forks/wheels, CBR125 any year forks/wheels “BUT” all parts must be originally fitted from the same Manufacturer
Rear shocks can be modified/replaced with no restrictions as long as they fit the original mounting points
Wheels
*Remain OE fitment for manufacturer permitted size 16″ 17″ 18″
Brakes
Pads, lines, master cylinders, discs, and footrest/hangers are allowed to be changed. Disc’s must remain the OE diameter for the model of bike.
Any chain and sprocket size can be used
Tyres
Any tyres permitted, tyre warmers are also allowed.
Bodywork
Any aftermarket fibreglass bodywork is permitted
Standard road bodywork is permitted but must have mirrors/stands removed. Head lamp and rear light glasses must be adequately taped to prevent splintering. Unused wiring for lights and switches etc may be removed.
Replacement parts only OE or pattern to OE spec parts can be used in engines
The only liquid engine coolant permitted is water
Oil sump plug and filler plug must be lock wired
A red rain light fitted to the rear of the Motorcycle
Moto4
Engine
Max 125cc/Minimum 120cc fourstroke engine no tuning restrictions
The use of superchargers/turbochargers is prohibited
Chassis
Any chassis may be used
Wheels
The only Permitted wheel diameters are 16” 17” 18”
Tyres
Any tyres are permitted as are tyre warmers
Bodywork
Any race bodywork can be fitted.
The only liquid engine coolant permitted is water
Oil sump plug and filler plug must be lock wired
A red rain light must be fitted to the rear of the motorcycle
GP50cc
Engine
Max 50cc two-stroke, no tuning restrictions
Wheels
* Permitted wheel diameters are 16” 17” 18”
Bodywork
Any race bodywork can be fitted.
The use of superchargers/turbochargers is prohibited
The only liquid engine coolant permitted is water
Oil sump plug and filler plug must be lock wired
A red rain light must be fitted to the rear of the motorcycle
Anything “NOT” mentioned above must be approved by the club
Minimum age 16 *dispensation may be given if previous race experience is proven*
Riders per team 2-6 mandatory rider change every 30 minutes +5 minute window
Newcomers are advised to wear hi-vis bibs
ALL MACHINES AND RIDERS ARE SUBJECT TO THE FOLLOWING
- The Technical Officer shall check the machine for class compliance.
- Noise limit Max 99dB(A), The noise test will be conducted with the microphone placed at 50cm from the exhaust pipe at an angle of 45°
measured from the centre-line of the exhaust end and at the height of the exhaust pipe, but at least 20cm above the ground.upto 250cc single (4-stroke) 5,500rpm
upto 125 single (2-stroke) 7,000rpm Exhaust system regs, Streetstock: minimum 320mm end can sold for the correct bike over the counter from a proven manufacturer named brand with db killer,no unamed/home built or copy cans
Moto4: A minimum 320mm end can with db killer fitted.
50cc: 99dB(A) noise limit
We suggest 400mm+ if you struggle with 320mm and 99dB(A)
“ALL” bikes must be 99dB(A) or below,any bikes above will not be allowed to take part untill tested at 99dB(A) or below, this is to allow for noise increase during the race, If the can is damaged during the event it must be replaced or repaired to conform to the 99dB(A) rule.End cans must be repacked if they go above the 99dB(A) limit.
approved manufacturersAIM:
The noise limit at most circuits is measured at an average over 30 minutes, this is in addition to a maximum single bike noise limit also monitored by the circuit.The goal is to comfortably be below the average and to prevent any single bike breaking the individual noise limit during the event and preventing black flags during the race.Exhausts should be regularly repacked to ensure they remain below the maximum allowed 99dB(A) limit.- Tyres must be race compound Treaded,slick or wets
NUMBER PLATES One number must be displayed on the front of the motorcycle and two side number plates. The numbers must be clearly visible to the public and marshals on
both sides of the machine.To be classed as a finisher you must complete either 50% of class leaders laps or pass the chequered flag at end of race
- All riders MUST attend riders briefing for that days race. No briefing No racing
- It is the responsibility of the rider to ensure that a machine used in competition is mechanically
and structurally in a safe condition. - Oil sump plug and filler plug must be lock wired.
- All motorcycles must have a functioning red light mounted at the rear of the machine to be used during rain or low visibility conditions (and front light when required) if your light isn’t working when needed you WILL be blacked flagged until a working light is fitted.
- Throttle controls must be self-closing.
- Petrol and oil filler caps when closed must be leak proof. They must be securely locked to prevent
accidental opening. - OIL CATCH TANKS & BREATHER SYSTEMS
Catch bottles / tanks must be fitted to the gearbox breather pipe(unless standard breather goes into airbox), fuel tank breather pipe, carburettor overflow pipe(s) and the radiator overflow pipe (if applicable) , where an oil breather pipe is fitted the outlet must discharge into a catch tank located in an easily accessible position and which must be emptied before the start of the race. - All handlebar levers (clutch, brake, etc.) must be, in principle, ball ended or be rounded.
- Minimum 2 riders per team, Le Mans start and rider 1 is the competitor to run across circuit,start the motorcycle and complete first lap, The person holding the bike must ONLY hold it for Rider 1 and not start the engine or push towards rider 1 across the circuit.
- Only 1 bike per team for the race.
- Teams may change ANY/ALL components on the motorcycle EXCEPT they MUST finish on the same frame as started, the only component not allowed to be substituted is the main frame.
- Any exceptionally slow riders/bikes may be black flagged, Clerk of Course descretion.
- Any Machine without electric/Kick starter that needs a push start will start from the back of the grid unless they have a paddock/roller starter then the rider can start in qualifying position using starter (which must be removed immediately)
- Any infringement of the rules and regulations will be penalised with one of the following penalties:
Disqualification – withdrawal of Championship points – suspension. - Quickfill/fuel dump containers are not permitted.
- Max 10 liter Fuel cans.
- All engines must be switched OFF in pitlane between the pre-designated areas on the day, usually but not confined to cones/Freetech arch at entry/exit to pitlane ANY bike running in this area will result in IMMEDIATE disqualification from the days event.
- Only 1 person (rider or helper) may push the motorcycle through the pits
- All machines must remain in designated parc ferme after the race for tech inspection, any motorcycle not in parc ferme or removed before permission will be excluded from the days results
- Any motorcycles found to be oversize will result in a permanant ban from future events
FLAGS USED TO CONVEY INFORMATION AND INSTRUCTIONS
NATIONAL FLAG or START LIGHTS :Signal for the Start of the Race.
Red: Race Stopped. IMMEDIATELY SLOW (with care) & proceed at touring pace to a stop
area as indicated. This will be pointed out at riders briefing or may be indicated by a circuit
marshal.
Any infringement of this rule will be penalised with one of the following penalties:
Disqualification – withdrawal of Championship points – suspension.
Yellow (Stationary): Proceed with caution – slow down,no overtaking up until the point
where the green flag is shown. Riders not observing the caution or overtaking rule will be
penalised.
Yellow (Waved): Extreme caution. Be prepared to stop – slow down, no overtaking up until
the point where the green flag is shown. Riders not observing the caution or overtaking rule
will be penalised.
Yellow: (With stripes): Caution, slippery surface – Ride accordingly.
Green: Safe to Race
Black: (with riders number shown) Mechanical / Riding Fault – Return to Pits and consult
official.
Chequered: End of race Return to Paddock or Park Fermē
Any infringement of the flag rules during a practice session will result in the cancellation of
the time of the lap during which the infraction occurred.
In case of infringement of this rule during the race, a time penalty may be imposed. In both
cases, further penalties
Riders must not ride or push their motorcycles in the opposite direction of the circuit, either on
the track or in the pit lane
RIDERS MUST OBEY THE FLAG SIGNALS, THE LIGHT SIGNALS, AND THE BOARDS
WHICH CONVEY INSTRUCTIONS. ANY INFRINGEMENT TO THIS RULE WILL BE
PENALISED ACCORDINGLY
During practice and racing riders must wear the following clothing and footwear:
A complete all in one leather suit or a Suit that is zipped together at the waist are permitted.
Competitor’s helmets bearing the current ACU gold stamp in sound condition and properly
fitted must be worn. Overseas riders may use helmet as approved by their own FMN.
Competitor’s footwear must be of leather and a minimum
height of 200mm to provide, with the suit, complete protection. No areas of skin to be left
exposed between the leg of the suit and the top of the boot.
Competitors must wear leather protective gloves. No areas of skin to be left exposed between
the wrist of the suit and the wrist of the glove.
One machine number must be displayed on the front of the motorcycle.
All riders and press must sign a declaration on the relevant signing on form
Terms & Conditions
Bookings for meetings
Cancellations of 7 days or more of the date of the event
Full refund less an administration cost of £20 per team
Cancellations of less than 7 days of the date of the event
No refund, no credit note.
Force Majeure
The Clerk of the Course has the right to alter, abandon, cancel or postpone all or any part of a meeting
for reasons of force majeure. Such a decision shall not be subject to any protest.