Posted June 16, 200915 yr 78 XS 400. When I go full throttle no matter what rpm/gear at about 6,000 rpms it sputters/hesitates for about 2-300 rpm then pulls fine after that, does this mean I am lean or rich or something else? My idle is perfect and the throttle response from 1200 rpm+ is awesome right now. Thanks!
June 16, 200915 yr Moderator 78 XS 400. When I go full throttle no matter what rpm/gear at about 6,000 rpms it sputters/hesitates for about 2-300 rpm then pulls fine after that, does this mean I am lean or rich or something else? My idle is perfect and the throttle response from 1200 rpm+ is awesome right now. Thanks! have a looksey HERE Also check the advance is working by using a strobe timing lamp and seeing the advance move on the crank
June 16, 200915 yr The symptoms are a classic rich cut. Too much fuel too quickly. Carb service is due.
June 17, 200915 yr Author The symptoms are a classic rich cut. Too much fuel too quickly. Carb service is due. Carbs have been fully rebuilt and cleaned already
June 17, 200915 yr Moderator Carbs have been fully rebuilt and cleaned already and how many times i've heard that before only to find some hidden "gunk" in the emusion tubes. did you strip and clean the carbs yourself using an ultrasonic cleaner or did you get it professionally cleaned?
June 18, 200915 yr Author and how many times i've heard that before only to find some hidden "gunk" in the emusion tubes. did you strip and clean the carbs yourself using an ultrasonic cleaner or did you get it professionally cleaned? I dont know where the emusion tubes are can you post a pic? I tore them down replaced the jets and needles and cleaned everything.
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