So I have a 06 blaster that I just put new pistons and jug on did proper break in. And went to get on for first time to ride and run first tank through it and put it in gear and start out fine give it any throttle and just boggs bad let off and will idle and put along. Revs good till bout 4000 in neutral then boggs also. So mods are stock head jug and piston fmf power core 2 full exhaust. And the fmf dynojet jetting kit. Bought it blown up so don't know what ran like before. I did the Jett kit with the rebuild customers old piston looked like it got to hit from being lean