no you dont need to rejet, It will run fine like that. But now you have the option of re-jetting....I would. I have the HRC end cap on a stock bike, but I have a sparks racing air filter kit, and a sparks racing jet kit...I am running a 185 main jet and everthing else is stock....air\fuel screw 2.5 out.....and you will screamOriginally posted by shoey@May 19 2004, 01:10 AM
Yes you will need to rejet, might as well remove air box lid and jet accordingly. 170-185 range. this will give real gains across the board.