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Dirt Bike Mods & Maintenance
Ever suffer a main bearing failure?
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[QUOTE="sci85, post: 1318476, member: 87311"] A buddy of mine brought over his kids '04 KX100 saying it had locked up momentarily and was making all kinds of rude noise. We'll, i pulled the engine and opened it up and found that the right side crank bearing had disentragaded and the left side had welded itself to the crank. The counterweight had scraped against the right side case spewing aluminum shavings everywhere. It was ugly :ugg: . However, I cleaned it all up and I don't see any other case damage except the aformentioned scrape (about 1/6" deep). The jug is ok. Here's my questions: I have never seen a main bearing fail like this. Any ideas what would cause this to happen? Is it safe to clean it all up, replace the crank assembly, rod, piston and main bearings and go for it or should we risk a rebuild? Thanks for the input. Sci85 [/QUOTE]
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MX, SX & Off-Road Discussions
Dirt Bike Mods & Maintenance
Ever suffer a main bearing failure?
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