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RULES 2007 Motolite Rules 1) Classes All engine configurations have an engine capacity
tolerance of 6% One class combining: 105cc Air cooled 2 strokes (111.3cc maximum) 80cc Water cooled 2 strokes (84.8cc maximum) 150cc 4 valve single cylinder 4 strokes (159cc maximum) 175 cc 2 valve single cylinder 4 strokes (195.5cc maximum) 150cc 2 valve(per cylinder) twin cylinder 4 stroke (159cc
maximum) Open to any grade of rider 2) Engines Choice of engines is open any engine conforming to
capacity and valve constraints under “classes” (section 1)
Except, no road race/GP or hand built engines 3) Forks Forks may be of any diameter, conventional or upside down 4) Frames The choice of frames is open. 5) Brakes Brake modification is permitted 6) Tyres & Wheels Tyres are to be readily available
in 7) Fuel Shall be as per
GCR’s only The
implementation and enforcement of the BRA Racing Rules is governed by the BRA
committee. Penalties for non-compliance will be determined by the committee. RANDOM FUEL CHECKS AND CAPACITY CHECKS WILL BE CARRIED OUT
DURING THE YEAR 2007 Superlite Rules 1) Classes All engine configurations have an engine capacity
tolerance of 5% One class combining: 2 Stroke: 105cc (110.25cc maximum) 4 Stroke: 150cc single cylinder & 150cc Twin Cylinder
(157.5cc maximum) The class is divided into 2 grades: Pro & Amateur.
Grades are decided by the BRA committee 2) Frames Frames shall be from homologated, non-competition, Road or
Trail machines only. Frames shall be twin shock design only (ie: No single
shock frames to be used). Frames currently homologated are as follows: Bridgestone: 90/100 Honda CB 100/125/175 K,J,S,N,T; XL 100/125/175/185, SL
100/125, H 100, MT 125, CT 100/125/185. Suzuki: GP 100/125, A 100, TS 100/125, TF 100/125, GS 125, DR 125
DS 80, GT 125, TC 100/125 Yamaha: DX 100, DT 100/125/175, RX 100/125, LS1, LS3, RD 125, RT
100, AS3, YL1, YB1 Homologation requests can be submitted to the BRA committee
for consideration. 2a) Frame Modifications Only minor modifications may be made to the frame to allow
the fitment of seat, triple clamps (steering dampers), shock mount positions,
or fuel tanks. The addition of bracing and removal of unnecessary brackets is
permitted. No restrictions on the use of swing arms. Frame must remain in the
original configuration and only twin shock frames to be used. (i.e. no single
shock frames permitted). The decision as to whether a modification is to be
regarded as minor is to be determined be the BRA committee. Persons are
directed to contact the BRA committee to seek a determination as to whether a
modification is eligible. 3) Forks Forks must be no larger than 33mm in diameter. 4) Engines Heads, Barrels & Crankcases shall be from homologated
non-competition Road or Trail machines only. The following are currently
homologated: Bridgestone: 90/100 Honda: CB 100/125/175 K,J,S,N,T; XL 100/125/175/185/200, SL
100/125, H 100, MT 125, CT 100/125/185, ATC 200, XR 200. Suzuki: GP 100/125, A 100, TS 100/125, TF 100/125, GS 125, DR 125
DS 80, GT 125, TC 100/125, DF 125,(DR 200, TLF 200 Head and cylinder only) Yamaha: DX 100, DT 100/125/175, RX 100/125, LS1, LS3, RD 125, RT
100, AS3, YL1, YB1 (only 2 valves per cylinder are permitted on 4 strokes) 4) Engine Modifications 4a) 4 stroke Cylinder head
modifications: 4ai) 4 stroke cylinder heads shall
remain in original configuration i.e.
Valves shall remain original angles and position and shall remain standard
sizes only (no larger valves to be fitted) 4aii) Porting is permitted 4aiii) standard camshafts must be used:
camshaft modifications are not permitted. Note.
Camshafts that interchange between homologated models may be used. i.e. CB
may be used in XL, GS may be used in DR etc. 4b) 2 stroke cylinder modifications 2
stroke barrels/cylinders shall be restricted to an exhaust port width of 70%
of the bore diameter with the standard number of ports. 5) Brakes Brake
modification is permitted. Disc brakes are limited to single or twin piston
callipers only. 6) Tyres & Wheels Tyres
to be readily available in 7) Fuel Shall
be as per GCR’s. No additives or (octane boosters) other than oil for
lubrication. 8) Induction Induction
will be by carburettors only 28mm
carburettors maximum for 2 stroke engines (that is 28mm at the narrowest
point of the carburettor bore/throat). No fuel injection, no forced air
induction 9) Fairings No
full fairings (i.e. No fairings below the top of crankcase) The
implementation and enforcement of the BRA Racing Rules is governed by the BRA
committee. Penalties for non-compliance will be determined by the committee. RANDOM
FUEL CHECKS, CAPACITY CHECKS, 2 STROKE CYLINDER INSPECTIONS, 4 STROKE HEADS
AND CAMSHAFT INSPECTIONS WILL BE CARRIED OUT DURING THE YEAR.
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