Test start bike 225: Martin-Jap racer +/- 1910. 500cc ohv Jap engine with ported cilinder.

First test start of Martin-Jap racer +/- 1910.
500cc ohv Jap engine with ported cilinder. Martin was the inventor of valve overlapping for bether filling of the cylinder with new mixture of the carburetor. Ported cilinders is a try out on the way to end up with valve overlapping.
Lots of smoke, oil, noise and fire 😜