Ok, not to steal the post, maybe these questions will be appreciate by the newb...welcome newbie. So, I did some peeking in the carb, which is a Mikuni 28mm, and my main jet is a #150, not sure about the pilot...my eyes apparently suck. My exhaust is an FMF Fatty pipe, with a Turbine Core 2 with spark arrestor. Now, I bought this machine about a month and a half ago, and I know nothing about what's inside it....and I'm fearing taking the jug off and inspecting, that will really depend on how the leakdown test goes. Looking at the engine, how do you know if it is ported, a head mod and things of such nature?