I have a 2002 1500 Mean Streak with about 60K on it. It has a throttle body on it. It also has a hyper charger. The bike ran fine before. It backfires on deceleration but I also do not have the baffles in the mufflers. One came out while driving and the other I took out to get the right size for replacement and have not put it back in yet. The bike would idle fine. The caps on the end of the cam shaft were leaking. So I pulled the motor and changed them. I put the motor back in and now It surges at idle. When I try to adjust the idle it quits. The bike starts fine if you give it a little gas. With the choke on some it will start with no throttle. I did nothing to the throttle body.