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CRF 250R bogs when i snap the throttle

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Ok i have a new 04 crf 250r ever since i got it i noticed that if i am close to idle and i snap my throttle it bogs.. now i really haven't messed with it way too much because i only notice it when i am warming it up and not a lot when i ride but it seems to be a problem and i wanted to address it.. all right so far all i have done is put a #42 slow jet and put the polite screw to 2 turns.. i really didn't get a chance to test that. but did notice the bog. now i am left to think my problem is with my accelerator pump/leak jet. i know that some people suggest using a #55. but would i have to adjust my timing linkage? or is my problem something else? i know my next mod is going to be the powernow what does everyone think about that? is it worth it to get the powernow plus with the powernow? and does anyone know of a rev box that is out for the bike?

thanx

xpress

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Don't evaluate the bike on the stand. Ride it to test and see if the bog is a problem under real riding conditions. The bike needs to be fully hot and ridden for about 15-20 minutes before you can get a good measure. Use the fuel screw to adjust fuel mixture and keep the idle set slightly high, as specified in the manual.

Secondly, make only 1 change at a time. Too many adjustments at once and there will be no way to assess the problem, if any still exists.

The leak jet does not affect the pump timing adjustment. Some riders like the Power-Now, but not everyone is convinced it's a good change to make, placing a plate in the middle of the air stream which could reduce top-end.

James

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