yamaha grizzly that just keeps quiting - Yamaha Forum : Your Yamaha Motor Products Community & Resource
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post #1 of 4 (permalink) Old 07-31-2008, 04:43 PM Thread Starter
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yamaha grizzly that just keeps quiting

Hi everyone, i am new to this site. i have a problem with my grizzly and am hoping that someone out there can help me fix it. I bought a 98 600 grizzly back in march and still havent gotten it running right. ive put 1000 bucks into it in parts alone, new clutch, coil, carb kit, etc, etc... the problem i am continuously having is the bike backfires and quits after it has heatened up and been riden for a few minutes.... after waiting a few minutes it will start up and run for a few more minutes before quiting again.... ive redone the carb, flushed out all the lines, changed coils, new battery, and so on. i dont think the cdi is bad, but i am running out of parts to change. does anyone know what could be the problem. Thanks and i appreciate any help you can give me. Wade
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post #2 of 4 (permalink) Old 07-31-2008, 05:53 PM
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How does it run up until then? Does it back fire all the time, pop through the carb at all?
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post #3 of 4 (permalink) Old 07-31-2008, 06:08 PM
time in a bottle
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not sure this is the answer, but some years for the grizzly had heat issues causing the fuel to boil, then quit running. My 03 had this problem and the dealership had to install a heat shield and vented side covers.
obviously the two models are not exactly the same (98 -600 & 03-660) but there could be a missing heat shield or some change that has been unintentionally made to the atv that has caused a similar problem to the one I experienced.
I am in no way guessing this is your problem I just thought I would give some insight through personal experience.
the grizzly atv's in general have too much heat and poor venting under the tank so It is a good place to look.

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post #4 of 4 (permalink) Old 01-16-2011, 06:20 PM
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valve seals would be something else to look at my 07 grizzly 700 efi did the samething and im a mechanic and i pulled the motor changed the valve seals and it worked like a charm
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