2005 Wolverine timing off? - Yamaha ATV Forum
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post #1 of 5 Old 07-04-2019, 12:34 PM Thread Starter
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My 05 wolverine was idling good but running terrible at all speeds above idle. I was sure it was a fuel problem. After much cleaning and adjusting, decided to swap some parts with my son's 03 wolverine.

-My carb actually increased the performance of his bike. I told him he couldn't have my carb.

-coil made no difference

-cdi box made no difference

-both bikes have had the parking brake limiter unplugged for years

-intake boot made no difference

So, I removed the plastic and started tracing wires looking for a pinch or bare wire. Wiring looks perfect.

Somewhere along the way while moving wires around, the bike will not start. Acts like it has jumped time, backfiring, kicking back.

So, I think the only component left is the pickup coil, stator. Never been into that before. Is this a big job?

The plug does make a spark, is there a way it could be firing at the wrong time?

Any advice is appreciated.

Last edited by Jdirt; 07-04-2019 at 12:37 PM.
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post #2 of 5 Old 07-09-2019, 05:39 PM
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flywheel key sheared.
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post #3 of 5 Old 07-10-2019, 10:39 AM
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could be out of time but it is rare. pretty easy to rule out though. stator and coils is not a big deal but order the new gasket and plan on an oil change when you do it (they are a wet stator) the no start symptoms sound like a vacuum leak. did you get the carb and boot back together correctly. your original sounds like it is possibly the hi speed pick up coil. i have never actually had my hands on a wolverine but have worked through a similar problem with a guy on here. ( you should go read his thread) either get a manual or download the specs and test the coils and stator before you replace them.
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post #4 of 5 Old 07-13-2019, 10:57 AM Thread Starter
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Thanks for the suggestions.

I tried every combination of the carbs and boots on the other bike and have pretty much eliminated that as a problem.

It really seems out of time to me. I'll pull the flywheel and check the key, and try to test the stator and pickup coil.

With all the backfiring and such, should I check the cam timing? Could the timing chain have jumped?
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post #5 of 5 Old 07-15-2019, 10:27 AM
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it could have jumped time but its rare without breaking something. check your valve lash as well, you could have a tight valve
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