Block issues? Yamaha YF 200

H

Harley15a

New member
Hi, I've been running the YF 200 Yamaha for less than 2 seasons, the track I run is a private track and only runs every 2 weeks. That being said I have broke 2 blocks completely in 1/2, separating cylinder from lower case on both. I'm running about 8,500rpm. Has anyone else had issues like this? Thanks! If link for photos didn't work I could use a tip on how to upload photos too! LOL
https://scontent-lga3-1.xx.fbcdn.ne...=59f37d8f0287f92f5cb27c52a71e44e4&oe=585E0FE1
 
There's a good chance that these are very old engines that had a metal core side cover gasket that when oil got on it they just fell apart. Ever sine we replaced the gasket we didn't have any problems unless they popped a rod or something. the new internals are bullet proof.
 
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