I put a new accelerator pump in mine, and that did not help I'm afraid. I even tried a brand new carb, (with the standard jetting) without any success. I'll recheck the inlet. vacuum areas - it certainly feels like it should be something like that.... also tried experimenting with and without vacuum advance - no obvious effect.

Last edited by SCX358G; 01/08/24 02:02 PM.
Dave
Blue 4/4 1969, Green +4 1953, (different) Green +8 1977