Put the 42 pilot jet in. Put the mixture screw around 2 1/4 - 2 1/2 and a 160-165 main jet. Your looking for a bog of any kind. Or popping on decel. And how well it starts up cold. The 42 pilot jet should make it start alot easier in the cold. Once your at a point where you feel like its perfect get a brand new spark plug and take it for a ride and run it to warm it up for a while then take it for a high speed run and right before you hit the rev limiter in 5th gear pull the clutch and kill the engine and coast to a stop. Pull the plug and cut the threads off with a dremel or airwheel and look at the base of the porcelain there will be a ring about a 1/4 off the base. It should be a dark golden tan color. If it is your spot on. Welcome to the forums!