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Big Bear 350 Carb help.. extra parts!

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Old Jun 12, 2016 | 06:29 PM
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Question Big Bear 350 Carb help.. extra parts!

Along with my many other projects, I had this '90's era Big Bear carburetor pulled and had it sitting in the garage for a long time. I finally got around to rebuilding it and can't for the life of me remember where the spring in the attached pictures went. I've looked at the parts diagram for the carb, and can't seem to find it. The rebuild kit came with one as well, so I know it goes in there somewhere! If you're familiar with this carb please help!

Thanks in advance.



Big Bear 350 Carb help.. extra parts!-rzivbsn.jpg

Big Bear 350 Carb help.. extra parts!-jg21ufw.jpg
 
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Old Jun 12, 2016 | 06:53 PM
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Originally Posted by artvandelay
Along with my many other projects, I had this '90's era Big Bear carburetor pulled and had it sitting in the garage for a long time. I finally got around to rebuilding it and can't for the life of me remember where the spring in the attached pictures went. I've looked at the parts diagram for the carb, and can't seem to find it. The rebuild kit came with one as well, so I know it goes in there somewhere! If you're familiar with this carb please help!

Thanks in advance.





That little spring will most likely fit on the mixture screw.....take the screw out, place spring on the screw, then the metal washer, then the "O" ring, then reinstall....and set at a couple of turns out from lightly seated.
 
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Old Jun 12, 2016 | 06:55 PM
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First try to find a parts manual for your ATV online, next try Mikuni, they might have a diagram on their web site. Surprised the rebuild kit didn't have any diagram. GL, can't be too hard.
 
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Old Jun 12, 2016 | 07:02 PM
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Originally Posted by hydrex
First try to find a parts manual for your ATV online, next try Mikuni, they might have a diagram on their web site. Surprised the rebuild kit didn't have any diagram. GL, can't be too hard.
I have purchased 100's of rebuild kits......and of many brands and have never had one come with instructions or diagram. It's not like automotive kits...
 
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Old Jun 14, 2016 | 11:14 AM
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Originally Posted by Fasteratv
That little spring will most likely fit on the mixture screw.....take the screw out, place spring on the screw, then the metal washer, then the "O" ring, then reinstall....and set at a couple of turns out from lightly seated.
Thanks! That was the ticket. Installed in the quad and fired right up - then the motor rev'd up so high I couldn't get to the key fast enough lol! It's amazing what a little air leak on the engine side of the carb can do! Got that fixed and it runs like a champ. Thanks again for the help!
 
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Old Jun 14, 2016 | 12:26 PM
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Originally Posted by artvandelay
Thanks! That was the ticket. Installed in the quad and fired right up - then the motor rev'd up so high I couldn't get to the key fast enough lol! It's amazing what a little air leak on the engine side of the carb can do! Got that fixed and it runs like a champ. Thanks again for the help!
^^^^^That is awesome!!!! Now enjoy that thing
 
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