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Need Help Diagnosing Blown Head Gasket?
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[QUOTE="razorboy, post: 1223007, member: 62244"] Hey Guys, Thanx for posting. Mystery is solved as the cylinder, piston and rings all got destroyed! I didn't notice the large gouge on the backend (intake side) of the cylinder. Seems to be a classic case of overheating. The rings seized at the front, pushed the end gaps out at the rear and the bottom ring end gap hooked on the bottom of the intake. This cracked the piston and folded the ring under causing the destruction of the cylinder. Since its nikisil, I have to buy a new top end including cylinder. Really sucks but at least I have 2 weeks before my kid starts the winter series so it will be ready. The bike has about 20 hours on it from a fresh rebuild. According to my racing buddies, this is too long for a race bike to go between services. That was my mistake I guess. There were 4 race nights and the rest practice. I personally don't think it was servicing that killed it. I think it had to do with losing coolant somewhere? Since I had topped it off the week before (Zerex pre-mixed) and then discovered it had dropped in level again when it blew up. The other drag is that the piece of piston that came out must have gone into the crankcase. I am going to pull the motor and flush it out but I may have to split the cases to be certain there are no bits floating around in there. Thanx Guys Bernie [/QUOTE]
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Dirt Bike Discussions By Brand
Dirt Bike Brands - Other
Need Help Diagnosing Blown Head Gasket?
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