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I have an 04 sportsman 400 and have no power on up hills. It has never had this before. Jets have been done along with airfilter. Any suggestions. Power seems to be alright on level ground but no on an uphill
 

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just the first thought that came to mind besides the carb is...

have you checked the condition of the belt. the reason i ask is because possibly while i flat ground the belt is not slipping, but when going up hill the belt starts slipping on the secondary and/or primary because the natural tendancy for the clutches will be to want to spin the opposite way the belt is moving....just a shot in the dark but something to check out
 

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And welcome to the board!
 
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