05-09-2020, 11:33 PM
It is informative to work out the speeds in gears corres say 50 mph in top. Car should still be willingly accelerating at the equiv of 50 mph. A severely retarded spark causes accel to flatten, and exh also flat. Does the throttle open fully? Note that with Solex a smaller air bleed jet richens. Does not have to be precise as petrol jets. If you have a spare can experiment with solder. My experience with other makes has been very little margin between normal mixture and too weak to run without severe flat spots, missing etc.
Mixture is affected by a myriad factors including valve timing and the exhaust system.
Mixture is affected by a myriad factors including valve timing and the exhaust system.