Question about 2005 Yamaha WR 450 F

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WR 450 F PLEASE HELP NEW HEAD GASKET FITTED HOW TO TIME ENGINE?

PLEASE WOULD SOMEONE SEND ME THE INSTRUCTIONS ON HOW TO TIME THE ENGINE FROM SCRATCH! A NEW HEAD GASKET WAS FITTED BUT I THINK THE TIMING IS OUT? NOTHING WHEN TRYING TO START OTHER THAN THE ODD BACKFIRE!!!!!!!!
HELP HELP HELP! PLEASE!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

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  • Anonymous Apr 15, 2009

    same issue, could the cam gears be 180 degrees out with the crank shaft ?
    Regards
    Randal

  • Dave Hansen May 11, 2010

    Hi,
    Did you or someone else replace the head gasket?
    The reason I ask is that I can help you, but I will need for you to answer a series of assembly step that were made.
    The first one I have is: Was the #1 cylinder at TDC?
    #2: Were the cams installed with the small marks lined up with the head and facing outwards?
    Once we know this, then we can go from there...
    Let me know..
    Dave

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Do yourself a favor > > purchase a factory service manual. I am not being flip when I say this. It sounds like someone has been into the engine and done who knows what. Ignition timing is simple enough but what if the prior owner messed with the overhead cam chain? OHV timing could be way off. Are the carburetors in sync and balanced? The manual should walk you through the service proceedures and settings. The manual costs a lot less than the repair shop but if you don't have the proper tools and knowledge of engine repair this engine is not one to just tinker with.

Posted on Mar 11, 2009

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