Up against a wall
I have an older pk80 with over 1000 miles on it. Moderately ported. Free flow exhaust, and NT speed carb with stock jet. The needle clip is in the leanest slot. I drilled a bunch of holes in the air filter cover so I believe it is breathing ok for the intake. Plug colour is okay if anything a bit on the rich side. 26 inch wheels with the 44 tooth. Upgraded plug wire and socket with ngk b6
I have been having trouble getting the rpm past a wall. Sorry, no tach reading. I'm getting some 4 stroking in low to mid rpms/speed. As I reach about 25 mph it sort of feels like bogging or is it 4 stroking? I'm not sure. The fuel flow seems adequate.
When the rain stops I will test again but it seems like the bike would rev up to higher rpm if I turn off the gas at the tank and burn off the gas in the carb bowl.
In the summer I was able to rev up to reach 30 plus mph and, as a side note, the engine actually smooths out at higher rpm
I suspect I will have to jet smaller but looking for confirmation of this.
Does anyone know what my problem is?
Just a chimp with a gun and an idea we should be free to ride our machines without gettin hassled by the Man.
Last edited by Chaz; 11-13-2016 at 02:04 PM.