Photo: Anthony Storey

2010 Superlite Rules

Homologation:

Homologation requests can be submitted to the BRA committee for consideration.
Download Homologation Form

Please Note: A motorcycle / engine / frame is NOT PERMITTED to be raced until it has gone through the complete process of homologation & been deemed legal to use.
Sometimes this maybe a little slow but the rules are black and white and until that motorcycle / engine / frame is deemed legal it cannot be used.

There are many other homologated bits that can be used in the mean time.

Superlite Rules 2010

Classes: One Class combining:
- 111cc 2 Stroke air cooled
- 159cc 4 stroke air cooled

Maximum capacities:
An engine tolerance of 2% is included within these capacities.

There are two grades:
- Pro Class
- Amateur Class
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:
90/100cc

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

Kawasaki:
KH 100/125, G4, G7, KE100/125 KV 100, KM 100

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

Only minor modifications may be made to the frame to allow the fitment of seat, triple clamps (steering stops), shock mount positions, or fuel tanks. The addition of bracing and removal of unnecessary brackets. 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).

2a) Frame Modifications
The decision as to whether a modification is to be regarded as minor is to be determined by the BRA committee. Persons are directed to contact the BRA committee to seek a determination as to whether a modification is eligible.
Forks:
Forks must be no larger than 35mm in diameter.
Upside Down forks not allowed.
Engines:
Heads, Barrels & Crankcases shall be from homologated non-competition Road or Trail machines only. The following are currently homologated:

Bridgestone:

90/100

Honda:

CB100/125/175 K, J, S, N, T SL100/125, H100, MT125, CT/125/185/200, XL100/125/175/185/200, ATC200 XR200.

Jianshe:
JS125Y (Complete 124cc engine), JS150Y Cylinder only.

Kawasaki:

KH 100/125, G4, G7, KE100/125 KV 100, KM 100

Suzuki:

GP100/125, A100, TS100/125, TF100/125, GS125, DR125, GT125, TC100/125, DFI25, DR200, TLF200 (Head & Cylinder only)

Yamaha:

DX100, DT100/125/175, RX100/125, LS1, LS3, RD125, XT125, RT100, AS3, YL1, YB1 (Only 2 valves per cylinder are permitted on 4 strokes)

Engine Modifications:

4a) 4 stroke Cylinder head modifications:

4ai) 4 stroke cylinder heads shall remain in original configuration i.e. Valves shall retain original angles and position.
Standard inlet and exhaust valve sizes only (no larger valves to be fitted)

4aii) Porting is permitted

4aiii) Camshaft modifications are 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.
Brakes:

Brake modifications are permitted. Disc brakes are limited to single or twin piston callipers only.
Tyres:

Tyres to be readily available in Australia; No slicks or wet racing tyres; Tyres are to be as they left the manufacturer, No modifications (ie. No re grooving) Maximum tyre sizes are restricted to a width of 100 section E.g. 100/80 x 17.
Fuel:

Shall be as per the GCRs. No additives or (octane boosters) other than oil for lubrication.
Induction:

Induction will be by carburettors only.
28mm is the maximum carburettor size allowed for 2 strokes (that is 28mm at the narrowest point of the carburettor bore/throat).

Standard type carburettors only on Honda CB125T, XL, Suzuki, Jianshe and any other brand single cyl. models that are homologated.
- No fuel injection.
- No forced air induction.
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 INSPECTIONS OF:
-- FUEL,
-- ENGINE CAPACITY,
-- 2 STROKE CYLINDERS,
-- 2 STROKE CARBURETTOR SIZE
-- 4 STROKE HEADS (VALVE SIZES) WILL BE CARRIED OUT DURING THE YEAR.

Please Note:

Although in rule (4ai) it states that only standard valve sizes must be used, any engine with standard valve sizes bigger than:
- Inlet 30mm
- Exhaust 25mm.
is unlikely to be homologated.

Note on Rule 8. Induction

Keihin PWK and the like are allowed.

2010 Motolite Rules

Classes: One class combining:

Air Cooled Motors of:

- 111cc single cylinder 2 stroke
- 159cc 2 valve twin cylinder 4 stroke
- 175cc 3, 4 or 5 valve 1cyl. 4 stroke
- 200cc 2 valve single cylinder 4 stroke

or

Water Cooled Motors of:

- 85cc 2 stroke
(Power Valves are now permitted)

- 159cc 4 valve single cylinder 4 stroke
- 185cc 2 valve single cylinder 4 stroke

These capacities are maximum sizes, a tolerance of 2% is included within these capacities. Open to any grade of rider.
Engines Choice of engine is open. Any engine conforming to capacity & valve constraints under Classes section 1.
The choice is now open, with the "No Hand Built or Road Race engines" rule rescinded
Forks: Forks may be of any diameter, conventional or upside down
Frames: Frames are open.
Fairings: Modern style race fairings allowed.
Brakes: Brake modifications are permitted.
Tyres: Tyres to be readily available in Australia. No Slicks, Intermediates or Wet weather racing tyres. Tyres are to be as they left the manufacturer. (ie: No re-grooving).
Fuel: Shall be as per the GCRs. 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 INSPECTIONS OF
-- FUEL
-- ENGINE CAPACITY,
WILL BE CARRIED OUT DURING THE YEAR.

Proposed Commuterlite Rules

Racing class open to all 4 stroke 125cc Commuter bikes.

To be eligible for racing, the motorcycle must have:

ADR Compliance.

It must have a 4 stroke engine of no more than 125cc.

The motorcycle must be made to comply with any general requirements of road racing in the MOMS.

The following items may be modified from OEM.