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Hi, Anonymous and the usual suspects are:
1. Fouled spark plugs.
2. Severely discharged or a damaged battery should have 12.5 volts or more and be able to pass a proper "LOAD" test if necessary, you may have a preliminary reading of 12.5 volts or more but little or zero amperage the battery is faulty and must be replaced, AGM batteries fail in this scenario more so than lead acid batteries.
3. Check battery terminals for damage or corrosion, check the battery cables at "BOTH" ends for loose, corroded, or broken connectors, "INSIDE" and outside the cable harness, perform connector wiggle test and check cables with an ohmmeter if necessary.
4. Loose connection at ignition coil or plug between ignition sensor and module.
5. Spark plug cables in bad condition, shorting/leaking, spark plug cable connections loose check for spark leakage in the dark.
6. Faulty ignition coil or electronic control module.
7. Faulty CKP, CMP, or BAS sensor.
8. Faulty ignition switch.
9. Tilt sensor needs a reset.
10. Security alarm failing to disarm needs reset
Good luck and have a wonderful day.
Actually it sounds like the solenoid is working fine. The clicking you are hearing is the solenoid when it's energized by you turning the ignition key and giving it power from the battery. I would trouble shoot the starter. Start by checking if there is 12 volts at the terminal on the starter. If you're getting 12 volts there, your starter needs to be replaced or rebuilt.
This repair should go pretty well. Start by load testing the battery. If the battery is old has some cell damage, then it would appear to be charged until it was put under a load. If the battery is fine, move onto both battery cables. Inspect both cables, from end to end. If anywhere on either cable the connection is loose, corroded, or frayed, it will fail to start. Then at last is the starter. unless you know how to bench test the starter. Please remove it and have it bench tested. This should just about cover popular failures. If you still have a no start issue then you either overlooked something or there is a defect in the wiring to the ignition switch circuit or the ignition switch itself. You can inspect the backside of the ignition switch and look for loose or over heater terminals. Good luck.
Verify all cables are tight and not grounding out due to broken casing.
Check the relay to the starter, it could be failing. Check that the starter is in good working order by passing current directly through it while its removed from the bike. Put a voltometer on the battery and check that its at full capacity ( volts and amps )
Make sure you have a secure ground to the starter and the battery.
Check the start button for continuity.
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.