[tbitz]

I noticed that my the mechanical timing advance on my 1978 dizzy has a range of about 20 degrees and that it is fully advanced at 3000rpm. I checked this with the vacuum advance hose disconnected.

I'm wondering does this seem right? There is no change in timing from 3000rpm and up.

Does anyone have an timing advance curve for the 1978 dizzy?

Perhaps there is supposed to be two mechanical advances and the upper rpm one is locked?

Cheers,