It could be as simple as a plug, clogged air filter, or a simply adjustment on the carb, You may need to rebuild the carb / but start by taking it off and cleaning everything and all the jets / you may even need new jets ? How old is the gas in it ? Have you ever let the gas sit in it for long time ? Good news for you is that a whole carb rebuild kit is pretty cheap / Ebay !! Im asuming this is a 4 wheeler first year after the cr 250 r or it could be just that ? I forgot exactly when they stopped making the cr 250 r / anyway when you take the carb off check the reeds inside the boot on the head , those wear out too but once again there pretty cheap ! you may have to go to a dealer for those , if you just flip them over, sometimes you can get a couple more years out of them ? If you dont have a manual I suggest you get one ? Once again ebay ? Good luck !!!!!! When it comes to carbs you need a manual !
Last edited by crazygrady127; October 9th, 2009 at 07:26 AM.