if your running a cool head the domes have to be cut so the pistons dont hit them.. unless you plan on running the spacer at the bottom, but most people have the domes cut instead. also you have a option of 795 pistons if you stay stock bore or moving to blaster pistons... oh and your going to want some new carbs 34-35 mm your 26's are going to starve that thing bad. check your clutch plates make sure they are good if not replace them the new power will shread those things if not. if your not riding in mud or water rip the air box off and run pods. also look at heavy duty springs for the clutch to hold better. tons of other thing you can add to wake that thing up