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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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.
Most quads Have the spark plug on top of the engine. In order to change a spark plug you need to remove the plug wire, Take a rachet with the size of the Plug, then remove the plug. Insert the new plug, Rinse, Repeat.
Check your Air Filter, clean it out, check for obvious blockages. Change the filter if it looks well used (look for excessive dust or color change on the inner part of the filter) or obvious wear.
Check for other blockages around the air filter inlet.
Check the spark plug, just change it for a new one so that eliminates that possibly.
Check your fuel filter and replace if needed.
Check the fuel tank for corrosion or dirt in the fuel. Empty it out, Clean it and add new fuel, be sure you have the correct fuel.
Check your Air / Fuel mix adjustment screws on the carburetor.
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.