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- - 400ex misfires (https://atvconnection.com/forums/sport-quads/373775-400ex-misfires.html)

brockkornely

10-12-2017 12:15 PM

400ex misfires

My 2001 400ex misfires at idle and dies and at low speeds but will continue to run. the problem seems to go away after it heats up, any suggestions? and is bone stock

old polaris tech

10-12-2017 04:40 PM

Have you done the simple things first like changing the plug,checking/cleaning the air filter? If you have,possibly could be trash or water in the carb or tank.

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