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2007 Rancher new carb will idle then a very high rev anybody had this problem?

961 Views 8 Replies 5 Participants Last post by  TRXStudent
I put on a aftermarket carb and didn’t adjust anything normally they work fine. This one upon start will idle for s second then rev up really high for a few seconds then back to idle and keeps repeating. Also the speedometer got some water in it and needs replacing would this make it cause that problem? TIA David
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Are you sure it's a 07? Thats the year they started putting fuel injection in the rancher and made it a 420, or did you put a new throttle body on it?
That's right I forgot they still offered the 400 rancher in 07, like said above it could be the China carb, try rebuilding the old one or find a used OEM or they still sell new OEM carbs on partszilla, and rockymountainatv for around 160
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