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Production 125

Engine capacity
Maximum 125cc/Minimum 115cc OE engine

The use of superchargers/turbochargers is prohibited

Engine type
Only four stroke OE homologated road engines.
No competition engines

Any carb “UPTO” standard OE diameter permitted on carb engines

Standard OE ECU/CDI /Electrics must be used

You can remove clutch/sidestand switches

Exhaust maybe modified or replaced

Engine Tuning is not permitted and must remain OE standard with no modifications whatsoever

Cutting of the ignition/fueling for the purpose of changing gears is allowed by a quick shifter mechanism

Chassis
Seat subframe may be modified for race seat

Suspension
The forks must remain standard OE, any internal modifications are allowed, external preload adjusters allowed. 

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.

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

Streetstock 125

 Engine capacity
Maximum 125cc/Minimum 115cc 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

Only OE supplied ECU/CDI permitted (Euro/USA/UK all models ECU/CDI permitted) NO altered or race ECU/CDI

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 is not permitted and must remain OE standard with no modifications at all

Starter motors if originally fitted must remain and be functional

Cutting of the ignition/fueling for the purpose of changing gears is allowed by a quickshifter mechanism

Chassis
Seat subframe may be modified/changed

Suspension
The forks must remain standard OE, any internal modifications are allowed, external preload adjusters allowed.

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 115cc 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/CLASSES AND RIDERS ARE SUBJECT TO THE FOLLOWING

  • From 2023 the only permitted non OE end can for 4 stroke engines will be an “unmodded/undamaged” powertech from Powertech UK
  • If less than 5 entries in a class there will only be a Trophy for 1st place.
  • 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

  • “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.From 2023 the only permitted end can for 4 stroke engines will be an “unmodded/undamaged” powertech from Powertech UK

    AIM:
    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 50% of class leaders laps at end of race

  • All riders MUST attend riders Briefing
    The Clerk of the Course/Official will conduct a briefing which all riders participating in the
    race must attend.
    Failure to attend the briefing will result in disqualification unless the Clerk of the Course has previously
    issued a waiver in writing to any participant.
    The briefing will include Flag Signals, Speed, Safety, the Timetable and all other general arrangements for the conduct of the race.

  • 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 their 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(no pushing riders sat on bike)
  • 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 permanent 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 and 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.

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Streetstock 125