yamaha11 Posted July 22, 2009 Report Posted July 22, 2009 my 421 was running good then started only running on one cylinder and really smoking out the side thats not firing. it starts right up and i switched the spark plug wires and still nothing. i changed the domes in the head and wondering if i did not get it sealed good. any ides thanks Quote
TeamRealtreeHD Posted July 22, 2009 Report Posted July 22, 2009 Pull the intakes... it's your reed on the side it's not running. Quote
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