Manufacturers of the race winning
Street Force
&
Race Master
Cylinder Heads

John Davies

Australian Hillclimb Champion 1992

Queensland Hillclimb Champion 1993

Queensland Hillclimb Champion 1994

Queensland Hillclimb Champion 1995

Australian Hillclimb Champion 1995

    ENGINE SPEC :- Suzuki EFE 1100 fitted with big bore kit to yield 1265cc. Suzuki 750R Cylinder head is modified to race specifications by JHH Performance Engineering , Compression ratio has been set at 12:1 with Flat top pistons . The engine revs to 12000rpm and uses avgas 100. Fuel is metered by a Haltech ECU
    John Davies noted that after trying many engine modifications such as high compression ratios and exotic fuels the most advantageous modification for power was fitting a RACE MASTER cylinder head and going back to flat top pistons on our recommendation.