So, last week I was riding along on my moondog with the happy time 2 stroke. Then all of a sudden I felt something that didn't feel right. The bike started slowing down but the engine was still reving! I thought the drive shaft broke. I popped off the clutch cover and half of the crank gear was in pieces! I was about 6-7 miles away from home. I had to pedal all the way back. The good thing was I had a spare sprocket from my blown motor. Has this ever happened to anyone?