Newport is sick.
99 main jet
im out of ideas.. here's the problem and what ive done..
one day fine, running great, really fast,.. next day sick, slow, 4-stroking. WTF!
i thought maybe first it was the heat, so i down jetted 12 sizes to get it to stop four-stroking!
also changed oil-gas ratio from 32:1 to 40:1. ~it stopped four-stroking but goes about 30-35 at full throttle on 80cc gila! bullshit!
and still kinda four strokes once i get to top speed of ohh 34 mph. (was going 50)
rings are fine, timing is good, carb is clean, clutch seems to be okay (no jerking), gas flows good, sounds great at idle, changed plugs multiple times, reeds look good, exhaust port seems to be pretty clear, everything electrical seems good ?????