So I rejet with a dynojet kit with 160 main and new needle in same position. says its for aftermarket exhaust below 3000ft. I dont have the exhaust on yet but even with the fuel screw out most of the way it still crackles/pops as you slow down from mid-low rpms. high rpms have no popping. but i was thinking that if i put a slip on exhaust on my bike it will make it run even more lean, more than it is now. this jet should make it richer no doubt? i also have a size larger pilot jet ordered just in case. its about 5 degrees celsius outside. and the last time i ran it before this it was 10 degrees or so and it ran slightly better. thoughts?