Question about 2003 Yamaha YZF-R6

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My Yamaha R6 2003 is over heating

I recently came back from overseas, After three years of unattendance I have found the bike over heats after a short ride. I have check for leaks or damages on the water tank and the pipe conecting them but there is no leaks or visable damage of any kind? Can you please help me!

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  • Lee
    Lee May 11, 2010

    could be old gas causing carbs to gum up, starving it of fuel, making it run lean will also make it run hot. running too lean can actually make your header pipes glow

    if you in the USA get some berrymans B12 fuel additive/cleaner. double the dose and throw it in the tank, mix it by shaking bike, run it til hot then leave to stand overnight. and try again.

  • tombones May 11, 2010

    Good job rdgrnr! Don't forget a stuck thermostat.

  • Dave Hansen May 11, 2010

    The first thing to check is your fuse for the fan. Your fuse panel is located towards the front on the left side of the bike behind the left plastic.
    Does the coolant temp light come on when it overheats? Does the fan turn when it's overheating?
    If not, then the following may be at fault:
    Fan motor, fan motor fuse,coolant temp sensor, fan relay, or coolant system wiring.
    If you need further help, I have the service manual, and we can continue this through email if you prefer.
    Let me know



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First change the Coolant temp. sensor. Its the easiest thing you can do FIRST. Thanks....That what i will do but I have another issue. The coolant starts over flowing from the reservoir when the temp reacher about 212F. I made a manual switch for the fan so i can turn it on myself when it hits 200F. Otherwise everything is just fine,

Posted on Aug 15, 2009


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