I was lookin to rebuild my 05 raptor 660 and i was wondering how hard is it and if it would just be worth puttin in an 11:1 piston and leavin the rest stock or does that not work and can i do it myself when i have never done it before and i am going to rejet the carb too and help. Thanks

 

11:1 102mm piston w/Stage 1 hotcam is a pretty standard build (assuming you have an after market exhaust).