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Have changed over, spark plug,coil,rectifier,relays,pulled apart every wire and put back with no corrosion,but quad has a mind of its own with the spark,1 minute it may run for a while the next no spark,im very puzzled.HELP!!!!
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it is inside eng trace wires from battery back to eng timing will jump if u dont stop it from turning remove spark plug and put something inside cylinder like a piece of rope to keep piston from moving must be on up stroke when doing this must not move piston at all. be careful good luck
coil you can test if you have a coil tester but doubt you do. CDI cant be tested. could also be a pick up coil on the stator, ignition switch, kill switch, tether if it has one.
My Polaris 500 started quitting on me. It turned out to be corrosion on the left handle bar kill switch wiring. After repairing, I pulled apart many wiring connectors and filled them with dielectric (does not conduct electricity) grease to make them resistant to water and corrosion.
Have you checked for spark? That's where you need to go to first. Take out the plug, put it back on the plug wire and hold it against the cylinder head. Kick over the motor and watch for spark.
just guessing that you have already changed the spark plug??!! Handlebar on/off switch in the on position? (yes, I have seen this come to the shop). After this you need a shop manual to check wiring connections, resistance values..etc.. if not... might be shop time.
what kind of a small noise? Describe? Is it a click, or a slight fizzle sound? If it is a fizzle sound, make sure none of the earth wires have come off the battery, or poor earth grounding. If it is a click, it could be the start relay/ignition coil. I dont have the model ATV you have, but mine has a small retangled black box, smaller than a pack of matches, if you follow the wires from your ignition coil. hold that and start and feel a click. The relay will send current to your starter. No click, no start. So check the ignitiion coil. Another problem can be a starter continual trying to run - which is a sticky relay.
They are simple things, spark, and fuel, and they run. I think you are having the same problem as I did.. someone before me fitted a kill switch and one of the wires came off the earth there, and it wouldnt start. Mine was under my seat, but it's a chinese quad, so just folllow the wires to the battery and from the battery until it meets the chassis.
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