The Rudge Python Engine, Page 3
THE Python is a nearly "square" engine having a bore and stroke of 85 mm. x 88 mm. giving a capacity of 499 c.c. Steel flywheels are used in the built up crank-shaft assembly which runs on a single roller bearing on the timing side and large roller and ball bearings on the drive side: the crankcase being substantially thickened to give rigidity at this important point.
Rudge Python Engines