Question about 2002 Yamaha WR 426 F
Lots of problems can cause this check rings are not gone by getting a compression tester and putting it in the spark plug hole and turn the engine over if pressure goes over 100 psi 7 bar then the rings are ok if below im afraid rings have had it also check to make sure the head gaskets is not blown by lose of coolant or oil coming out of head good luck
Posted on Aug 20, 2009
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Posted on Jan 02, 2017
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