Originally Posted by thesurvivalist
On some other boards I read about the motor stumbling. What exactly does that mean?
With the stock tune, it seems most of these bikes have a periodic stumble or hesitation in the 2500-3000 RPM range. You'll be putting along in second gear at steady throttle and ~30 MPH and feel the bike sort of lurch periodically. Apparently this is due to the lean fueling; it's not a big deal.