2008 Big Bear smokes at start up when cold outside

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#21

03-10-2014, 05:21 PM

Noubie

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Quote:

Originally Posted by Joe04785

I know this is an old post, but I'm curious what you found to be the problem? My BB is doing the same and I'm thinking valve seals but unsure.

Thanks

Hae Joe my bike did the same untill I was able to take it out for a real good long run and heat it right up.I think the rings didn't seat properly after the BB.

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#22

03-11-2014, 03:05 AM

Joe04785

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Hey Noubie, thanks for the response. Is it me or are the rings hard to seal on a BB?

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#23

03-11-2014, 09:52 AM

TLC

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Yamaha just stroked the 348cc that's found in all 350 Yamaha ATV from Raptors,Warriors,Wolverines,Briuns to Grizzlies from 64.5mm to 71.5mm making it a 386cc. The bore is unchanged at 83mm.

The 350 Big Bear and 400 Big Bear really almost have the same motor.

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