Heres a J.A.P. identification chart : www.donaldantiquerototillers.com/JAPEngineChart.htm
just measured the ' manifold ', at the moment its 1" bore . Willneed the 1 1/4 " if Im to get 100 mph down Sulby Straight . !
havnt rotated it yet , first stage will be get the head off , & move out the Redbacks & Tarantulas .
the muffler was stillmint & painted ,if not the header pipe . So Im hopeing it hasnt seen a lot of use .
Apparently some outfit still carries spares for them , so shouldnt be a lost cause entirely .
Hopefully find a old chassis thats suitable , though theyre seldom 20 bucks these days - so a ridgid wouldnt be to hard to knock up
if it comes to that .Coustom built with a rice burner front end & 4 speed trans . Maybe . . . one day . . . .
The Japanese response to ' styling ' , was to add more .