Similar tale here.Fell off Beta,me and the bike got trapped under an exposed cast iron water pipe that we play on,the bike was stuck on full chat in third gear,with the throttle buried in the ground,couldn`t stop it for what seamed like an eternity,but was probably about 30 seconds.When I got the bike out,there was no compression and it wouldn`t start,After stripping it,i needed a new barrel and piston.But after talking to one of the guys who races,he said that even with the magnetic kill,if your bike is stuck on full throttle,the spark plug acts like a glow plug and keeps on running,anyone else heard this?