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Honda 400X

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  1. So i have no fuel filter and even ran it without petcock filter.. i never run it that hard for top end but when it happened i had to see what was going on with it.. it definitely was under geared i had to drop the rear sprocket on it and it fixed everything now it run like a champ.. No idea man.. all i know is i put a 2005 400ex engine in a 86 350x frame and seems like it was under geared.. when i was on 5th topping out on the road for a long period of time gunning the throttle it would starve eventually but normal riding in the trail it road perfectly fine.. this will only happen at wide open throttle in the street once it hit max mph and about 2 miles later..I would know it will starve because the second it would act up i shut the fuel valve off and stop the bike I would drain the carb and nothing will drain out..
  2. No idea man.. all i know is i put a 2005 400ex engine in a 86 350x frame and seems like it was under geared.. when i was on 5th topping out on the road for a long period of time gunning the throttle it would starve eventually but normal riding in the trail it road perfectly fine.. this will only happen at wide open throttle in the street once it hit max mph and about 2 miles later..I would know it will starve because the second it would act up i shut the fuel valve off and stop the bike I would drain the carb and nothing will drain out..
  3. So I already figured it out.. believe it or not it was gearing.. i have a 05 400ex motor in a 350x frame. I went to a 36 in the rear because my bike on 5th was screaming like it wanted to blow up and felt i needed to shift to 6th which there isn’t.. now it rides awesome and no more running out of fuel because i was over reving.. 350x frame is much lighter more aerodynamic and just 3 wheels on the ground.. i had checked all fuel flows i swapped petcocks, fuel lines, fuel cap and even carb and did nothing.. thanks for replying!👍🏻👍🏻
  4. Hey Dorman10 did you ever figure out your problem? I have same exact problem and done EVERYTHING you have done and nothing!
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