i just got a 2000 yz125. I had the the whole crank replaced by a professional bike repair shop. I got the bike back, and ran it for not even 5 minutes. I slowed down, it made a weird noise and stalled. I looked over the bike and there was nearly a 2inch crack from the top of the crankshaft going down. Any one have any ideas why this happened, or what i should to do fix it?
