I recently bought a 1987 Suzuki RM 125 for my son, knowing that I had "A LITTLE" bit of work to do. After more investigating, that has become more work to do. Basically, I have to replace both sides of the engine case because there is damage to both sides. I have disassembled the entire motor. After looking online for used engine cases, I have found a person who has the bottom end, without the stator, for $300. Never having assembled a motorcycle engine before, it seems like this would be a much easier way to go, basically I just add my top end and go. The other option is buying the 2 new cases and new bearings and using all the guts out of mine. Not sure which way would be better. Maybe a little cheaper to go route number 2, but less work to do number 1. Any advice?