ATV issue

[Toomanytoys84]

I tried unplugging it without results I wonder if I should make a jumper to cross the wires.

Sounds like if you check from the Grey wire to ground.

 

[ol' stonebreaker]

Going way back I had a kx80 bike that had similar issues were it idled fine but had no power. Here it was the exhaust muffler/spark arrestor was clogged up, ran like a champ after a new one.
Not going to harp on it but again all the dirt bikes and atvs I had and I will say it again use a good new ngk plug with the correct gap.

That would be easy to diagnose by removing the muffler.