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FJR Motorcycle Forums
Technical & Mechanical Problems
Piston Hit Valve, spark plug melted
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<blockquote data-quote="RaYzerman19" data-source="post: 1063955" data-attributes="member: 18388"><p>It does smell a bit like toast, and only venturing a guess that the tensioner was not fully released, chain skipped a bunch of teeth, the first valve fully open at the wrong time would have hit the piston, demo-ed it and the plug. All the others could be OK..... yep, pull the head and see where you're at with the other three cylinders. IF you're up to splitting the cases, crank needs to be checked for true, replace that rod to be safe, new piston, etc..... you're in deep at this point. I wouldn't be too skeered of a used decent mileage engine from a wreck. It's your best bet.</p></blockquote><p></p>
[QUOTE="RaYzerman19, post: 1063955, member: 18388"] It does smell a bit like toast, and only venturing a guess that the tensioner was not fully released, chain skipped a bunch of teeth, the first valve fully open at the wrong time would have hit the piston, demo-ed it and the plug. All the others could be OK..... yep, pull the head and see where you're at with the other three cylinders. IF you're up to splitting the cases, crank needs to be checked for true, replace that rod to be safe, new piston, etc..... you're in deep at this point. I wouldn't be too skeered of a used decent mileage engine from a wreck. It's your best bet. [/QUOTE]
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FJR Motorcycle Forums
Technical & Mechanical Problems
Piston Hit Valve, spark plug melted
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