sixsixt,"05 660/719,,stroked, bbk,stage 3 hc sparks bigcore proform airfilter open airbox...160/165 mains,27.5 pilots, 21/2 turns on air screws .needle in bottom clip. problem is busting out in wot,a little backfire after reving. ran great before adding proform airfilter.changed mains from 150/170 now runs like crap. can you help me? thanks for your time and knowledge.........., david moody.first bike i ever built. pm me at moody2558@gmail.com and thanks again

So I have a problem I changed all of the Jets back to stock because I was having popping and backfiring now I still have a little backfiring and can get to a higher Rev but don't know what to do now

2002 660 raptor