I have broken a couple.

Unfortunate it was due to "user error". Your buddy most likely broke it due to a mis tune. Probably went to lean and dead-in-it-ate it to hell. (I can't spell

) Any way if you look at the bearings it will generally tell you the whole story along with the wear marks on the piston skirts and cylinders.
If the bearings look like someone hit them with a tiny ball-peen hammer then your answer is big time dead-in-it-ion issues!
****, we need some spell check up in this bitch
