Hi gang, i was trying to work out the jetting on my carb. My setup is:
Old polini 208 (single ring kit), ported engine, JL exhaust and the 28mm carb.
On the carb i have:
Jjg needle (middle clip)
40 Pilot jet
At idle, I find that if i open the trottle even a bit and close it, the engine revs up and down for maybe 2-3 seconds then slowly comes back down.
As well, if i raise idle setting a bit and turn in pilot screw, the engine actually starts to race, and if i back it out past 1 turn, the revs go down. This seems to be the complete opposite of what should be happening, right? What am i doing wrong? Any ideas? Thanks