Design & Manufacture
of Inca 2001
Winning G50 Engine

 

SPECIAL 'Narrow valve angle' G50 Engine

This engine was developed by ourselves for George Beale Motorcycles. It has proved very successful in the hands of Sandro Baumann who won the 2001 Inca Championship

STD SPEC SPECIAL SPEC
Borex Stroke

C.Ratio

Inlet down draft angle

Valve angles
90x78

11:1

12 deg

74.5 deg
92x75

13.5:1

25 deg

53 deg

 

Comparison of original rockers (TOP)
with special short rockers (Bottom)

Early prototype narrow valve angle head

Flywheels are manufactured with integral shafts, hardened then fully ground