My problem was, My Blaster wont go all out since my piston blew, I can go 3/4 of the throttle and It wont go all out. It act's like It want's to but It wont. Prime said It could be my jet's. I think all I have to do Is clean them.
when u installed the topend you may have put the piston in backwards, also did you get a piston that matches ur current bore n hone if u even did that if u didnt match them then the piston is gunna be too small for the bore and has not enough compression