Originally Posted by jeffreylin
There are 3 version of the JP. One is "stock" with the silver case, then you have the modified with the black case, and the "full option" which is the same as the black modified one but with hardened crank and ceramic bearing. Modification is done by JP (the company, probably not the man).
As to the speed, I've found that I have to run these engines richer in the bottom and leaner on top for best performance.
Yes thanks. I know, but I've never heard the Factory Mod kind of thing. Actually, I count there are 4 type for sale. stock silver case, black case modified, black case black crank mod, full option with ceramic bearing.
Another one is a limited quantity team engine (sometimes prototype) with a jp signature, only can ask by special order for big race. Maybe there will be another engine modified by JP Racing but the deal is not done yet
