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Discussion Starter #1
Ok raptor 250 fans. The Yamaha service manual shows an O-ring between the cylinder and crankcase on the oil port but the Yamaha parts breakdown does not show this. My gasket kit has everything but no O-ring that would fit this recess. Is there supposed to be one there or not and if so what is the size or part number?
Thanks
 

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Was there one there in place upon removal? If so you can always just go to local box store and find one that matches, using what you removed.

Welcome to the forum.
 

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I may be getting older, but I refuse to grow up!
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If there is a groove for a "O" ring you should use one. No groove, just use a gasket.

WELCOME TO THE FORUM.
 
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