Air/Fuel ratio vs ignition timing

[CuriousJojo100]

So I finally got my clutch to stop slipping. The power input has gone up dramatically at all speeds and the clutch couldn’t keep up. I been doing some tuning. Im running the pz20. I went to full rich on the needle and full advance on my ignition timing. Results: No idle with the idle screw fully tightened(highest idle speed setting). Hard to start and very little power at very low RPMs. Very good torque from low to about 3/4 of the way to top speed. Started “4 stroking” and stopped gaining speed. I started doing runs while backing of the mixture screw in 1/8 turn increments. I got to a point where I started losing partial throttle power. Can someone explain how afr correlates with ignition timing?

 

[Chainlube]

Ignition timing is fixed, so how did you advance the timing? If it's hard starting, then you probably have an air leak.

 

[CuriousJojo100]

Ignition timing is fixed, so how did you advance the timing? If it's hard starting, then you probably have an air leak.

I dremeled off half of the top of the woodruff key so the magneto was able to be turned. I also enlarged the 4 mounting holes on the two contacts that go on the top and bottom of the magneto so that those can also be turned then tightened

 

[Chainlube]

Good luck with that then.