Top Mountain Motorcycle Museum
Triumph, BMW, & Kawasaki Sales Spares & Repairs.
Established for over 40 years and run by expert motorcyclists.
Fully authorised workshop.
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.