I've had my blaster motor work done by CT Racing. They do awesome work. You should wait a little while. CT is comming out with bolt on Pro-X cylinders, already ported, that can bump your banshee up to 450cc. I think their suppose to be out sometime this november. I think theres suppose to be different options on the displacement. I'm pritty sure theres stock and 450cc, but there may be others.

 

I use a CT370 kit in my MX banshee. It is a very powerfull and reliable kit. It ran like crap till I got rid of the single carb and slapped the stockers on back on it. Now it screams. I am planning on getting 28PWK carbs and V-FORCE reed cages but s so fast as is I havent done it. I ran it with FMF pipes first, but I got rid of those and I am now running LRD adjustables and WOW! Those pipes and engine package work really well togather. As a matter of fact Shawn at K&K ATV is the one who convinced me to go to the LRD pipes. This is the exact same set up as they run on there national mx banshees. And there rider was kicking Azz in the open class till he was injured. I would reccomend either CT or LRD for motor work. Allen at CT is a super nice guy, and will work with you to get it set-up the way you want it. LATER!