Suzuki king quad problems when pushing throttle it pots then goes then pots again

https://www.suzukiatvforums.com/threads/torque-specs-for-head-bolts-on-a-2001-king-quad-300.1273/

https://www.bikebandit.com/oem-parts/2001-suzuki-king-quad-300-4wd-lt-f300f-cylinder-head/o/m147728sch275543

Sounds like the nuetral detect switch is bad or the wiring to it is cut. This sensor is on the transmission hub.

Sounds like you have a wire that is ALMOST broken or the insulation is worn off and grounding, or turning is pulling a wire loose from a connection. .. this type of problem is HARD to trace down sometimes... good luck

did you adjust the valves? check and make sure the fuel pump is putting out enough fuel, way past time to replace it. check your voltage too, the regulators in those are famous for dieing.

suzuki king quad replace spark plug YouTube

Personally i would check and see if you have any water in the carb before anything. this seems to be a common prob.

Take directly to a professional! DO NOT ATTEMPT TO RIDE!! It will just get more expensive!!!!

Check gas tank petcock,, its stopped up or broken...

see if you have power from stater, if you do, problem will be cdi