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I have a 2002 suzuki king quad 300, just replaced valve seals and compression is 100 psi with eletric start and throttle wide open, starts right up but smokes like crazy at startup and while driving it. Thinking it needs new rings but no clue what the oem size is, any ideas what it is, ideas and opinions appreciated.
 

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Since you have to take the Cylinder off anyway, you can check it with a bore gauge and make sure it is okay. Rings do wear down.

Since that motor has 3 rings on the piston, it could be that one of the rings is collapsed or worn out.
 
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