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Discussion Starter · #1 · (Edited)
Trying to help a friend with his Quad. He was out riding when 420 just quit. had to be towed out. It has no start no roll. It has no spark, with key on and starter is engaged with a bypass. Lights work as they should. Brake lights work front and rear switches. Battery is fully charged. If ECM is suggested, could the forum tell me where to find it? Neutral light comes and goes when it should by operating gearshift. Hope someone can help.

Thanks in advance
 

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Need more info... which year and model is the 420? You can get an FSM HERE if you haven't already got one. Welcome to the forums!
 

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Check fuses with a voltmeter on the test points on top of each fuse while they are installed, then clean the negative ground cable at both ends and then the grounds on the frame coming out of the harness and/or coming from the motor to the frame. After those are checked unplug the kill switch and check for continuity in the run position.... then check the Ignition switch. From there it'll be Fuel & shutdown relay tests, Bank Angle Sensor, etc. Keep us updated if you can...
 
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