I have a 05 CRF 450 with the twin air system installed. My question is: Does this modification typically call for jetting changes? I am in So. Cal (sea level, 70-80 degrees). I also have the T-4 slip on. The bike seems to be touchy off the bottom and want's to die if I wick the throttle to quickly. It also has a tendency to pop on deceleration pretty bad. I actually had a pretty good crash at elsinore 2 weeks ago when I hit a small 2nd gear jump out of a corner and the bike just died in mid air when I blipped the throttle.. I have all stock jetting right now.
Any advise?
Any advise?