400ex carb problem
Dec 2, 2014 | 05:18 PM
#1
400ex carb problem
We have recently rebuilt a 400ex. It was smoking so we rebuilt the top end and the carb. Ever since we rebuilt it, it will run only with the choke on. When the choke lever is turned off it backfires and dies. it has a 152 main and 42 slow jet. we have also tried a 148 and 38.
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