In october I took the dive and decided to have the motor ripped apart on my kfx and drop some serious money in the motor after doing some research I went with trinity racing in california. About $2000 later I had a big bore kit with a JE piston, Ported Head with a valve Job and Web stage 2 cams. I already had a pro circuit pipe and a power commander with a FUEL ATV intake (which is great by the way! 5HP gain). Now I am faced with the deliema of why my bike is only making 45hp ugh. One of my buddies has the same bike with only a high comp piston, homeade intake, pro circuit pipe and power commander and is making 55hp. WTF! I dont know where to start with this thing if anybody has any ideas I would be happy to hear them.