ok i ride mostly pits and play around. i like bottom mid range pull to climb, but top end is fun to have. soo far i have pc pipes vf3's, air filter pods no air box with outerwear, tors delete. from what i know engine is stock accept for wiseco pistons and dirt digger clutch kit usin heavy duty springs. bike ran good and strong all summer last year not one faliure.
now i want a stronger and faster engine. what would be my best choice as an engine pkg. i already have mikuni 34 tmx flat slide kickin around and i have the cables for them. soo i would like to use them.i was thinking about a cheeta kit 400 or 420 with power valves. maybe just a 4mill with porting still not sure.anyone plz shim in give me some ideals