Speedway Workshop

 
The JAP 4-Valve

With the advent of 4-valve Speedway machines, JAP made a last effort to remain competitive. Here are two views of the rare four-valve dohc speedway JAP engine that represented virtually the last development of this famous engine. Here it is built into a Grass Track frame.



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Melbourne Motorcycle Workshop
Melbourne Motorcycle Workshop
Dyno Tuning, Performance Enhancements, Sports Bikes and Offroad. Rebuilds, Race Preparation and Classic Restorations.