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My polaris revs up and down when i start it

When i start my Polaris sport 400 it revs up and down when i give it gas. its not ride able with this problem. what is wrong with it?

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Check to see if you have any plugged jets. Also make sure your air box is sealed tight, check the vacuum diaphragm in the top of the carb that operates the slide, and also check your exhaust cam.

Posted on Oct 25, 2012

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Posted on Jan 02, 2017

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My 2010 Polaris 330 trailboss will idle all day but when you give it gas it wants to bog down and die


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Hey Ang,
Just from what you have told us... this seems a little more complicated than simple... Does it only run wide open? ...Has anyone been "working" on this atv...?? IF they have been working on the carb, you may have put the slide in incorrectly...there is a groove down the side of the slide and a pin in the carb the groove runs on...
1. Compression should be 120PSI...or more, with the the throttle held wide open and kicked over 5-8 times.. The carb may need to be professionally cleaned and set...(take it to a qualified professional)...do this and reply to me..

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