@NOREMAC770 it added some, a noticable difference is performance. but if ur going to do a exh i suggest doing it all including a power lid. the stock performance setting is very restricitive
@insaneclown33 haha u should check the new vid. it sounds much better. it could be just the differences in engines. the z400 and ex are both 400s but engine wise they are different. but you should try rejetting or adjusting your idle screw it might give you the results you want.
put a better rider! his inexpierence shows on his take off. z's like to pop up sometimes so he should be leaning farther up so he can get the holeshot. ive beaten raptors of all kinds, mostly its rider.
@NOREMAC770 it added some, a noticable difference is performance. but if ur going to do a exh i suggest doing it all including a power lid. the stock performance setting is very restricitive