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Discussion Starter #1
I am new to this forum and I need help.I got this 300ex on a trade for some work that I did for someone. About 2 days after I got it I found out that it is smoking. It is not smoking out of the exhaust, there is some kind of a vent hose on the back side of the engine and it is smoking out of it. I don't know much about these bikes. What could it be and what do I check, or do I just need to rebuild? Could it be the rings, or is it the top end? Need suggestions.
 

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Welcome to the forums. I would say it's blow-by yo can run a compression check to determine if you have the spec. amount of compression, but I would say it's probably getting time to freshen up the engine.
 

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Yeah, I agree with that, too.
 

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welcome to the formus..and yes..you probally need to do a top end rebuild..from the sounds of it.
 

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Welcome to the forums.
 
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