I have been riding the bike to work for the past two weeks. Half way to work the other day the motor locked up. Pulled the head and all looked fine, pulled the clutch cover and that looked good. Last place to look was the mag cover... Bingo... Magnet exploded and locked into coil. Did some damage to the crank and keyway, was able to repair... Lucky... Bike back together and running goooooood...sure is nice to have a well tuned 2 stroke