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2000 Yamaha Big bear 400 running funny

Shook

By Shook
in Yamaha ATV Forum

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Shook Newbie

Shook

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Hi I have a 2000 big bear 400 and i just put a new carburetor on it and it idles fine but when you try to accelerate it sounds like it is going to die, so when it sounds like it is going to die I will give it more throttle then it will go just fine.

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  • 2 weeks later...
Frank Angerano Grand Master

Frank Angerano

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Haha that was my exact question I was going to ask @BuggyMasters, sounds like a typical Chinese carburetor. 

These cheaper carbs all react the same. They have a flat spot in them that you need to get past in order to accelerate.    And even after that spot is past it will not stay accelerated for long.   Bottom line is they don’t work well.  

Honestly I would rather take my chances and  buy a used oem carburetor from eBay and rebuild it if need be.   

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