2008 Big Bear smokes at start up when cold outside

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Mar 10, 2014 | 05:21 PM

#21

Noubie

Weekend Warrior

Joined: Nov 2013

Posts: 23

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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.

Mar 11, 2014 | 03:05 AM

#22

Joe04785

Trailblazer

Joined: Feb 2014

Posts: 38

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

Mar 11, 2014 | 09:52 AM

#23

TLC

Extreme Pro Rider
God forbid he lets the polishing secret out!

Joined: Jul 2006

Posts: 11,805

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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.