78XS400 Posted June 16, 2009 Share Posted June 16, 2009 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! Link to comment Share on other sites More sharing options...
Moderator drewpy Posted June 16, 2009 Moderator Share Posted June 16, 2009 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 Link to comment Share on other sites More sharing options...
yoda Posted June 16, 2009 Share Posted June 16, 2009 The symptoms are a classic rich cut. Too much fuel too quickly. Carb service is due. Link to comment Share on other sites More sharing options...
78XS400 Posted June 17, 2009 Author Share Posted June 17, 2009 The symptoms are a classic rich cut. Too much fuel too quickly. Carb service is due. Carbs have been fully rebuilt and cleaned already Link to comment Share on other sites More sharing options...
Moderator drewpy Posted June 17, 2009 Moderator Share Posted June 17, 2009 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? Link to comment Share on other sites More sharing options...
78XS400 Posted June 18, 2009 Author Share Posted June 18, 2009 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. Link to comment Share on other sites More sharing options...
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