Re: \'89 Quadzilla jetting
I pulled the head, gasket is fine. Pulled the carb again. I found all the stock jets (main, NJ, pilot) in there when I first checked, so I took for granted the needle was right. Wrong. Right needle, one clip too high. When I had the head off, the piston top was washed clean from raw fuel. I've cleaned the (stock) air filter, both layers. Tried it with the outer layer off, and the box lid off, no better. My leg is killing me from kicking it, it's got every ounce of compression it should have. I think it's just too heavy on oil, with the oil slowing down combustion to the point of leaving unburned fuel.
On a related note: what plug should this have? It had a Champion N4C in it, which I think is equivalent to an NGK B7ES. I don't have any B7's, so I've been trying B8's and B9's.