Apache quad rlx250 ax

Adjust your idle speed up a bit. There will be a small adjustment screw on the carburetor, turn it clockwise a bit until the idle speed is good. If that does not work you could have a plugged idle circuit passage.

adjust cable or bleed hydraulics
problem can also be caused from dirty oil or incorrect oil in the transmission/ clutch pack

I take help from online websites that have this service like helping in repair some like reliable-store have instant help.. others are a bit slow which I don't prefer... rest is up to u.. U can also get free manual works fine .

suzuki king quad replace spark plug YouTube

The CCs are marked on the bottom of the cylinder on the side of the motor right above where the cylinder meets the crank case.

carb might be clogged clean it

Check the power comming from the stator plate.

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.

Could be the CDI. Check the stator and pickup coil specs with a multimeter first.

Go to easyquad parts technical help and you can download a wiring diagram for apache 100, this should be the same as what you need.