Well, I just got home from Sand Mtn. and I wasnt able to ride the KX5Zuki much because anytime I hit 3/4 or more throttle and let off, the motor surges, wont stop until I put a load on the motor, let clutch out slightly. I was worried about riding it too much because I was worried it could be an air leak. The plug shows a very rich condition. What causes the motor to surge? The KIPS works, no binding, has the mod done so no over rotating. Heres a couple pics too by the way, people have been asking about it.