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.



About the Speedway Workshop Archive
Allen Motorcycle Museum
Allen Motorcycle Museum
Private museum in Boston, MA, with many highly collectable vintage motorcycles for sale.