performance upgrades for Yamaha 90hp
As a man who has owned 2 rally cars, which were heavily modified, i was hoping someone would have ideas (trade secrets) on simple performance modifications, filters, timing, tuning etc ??
I know reliability has to be at the top of our priorty list, but with cars! simple mods do not often effect reliability and can sometimes improve economy.
But as this is a 2 stroke i hounestly have no idea where to start, or if its worth persueing
I have a Yamaha 90hp 2 stroke (commercial version) 1996 grey not blue case!