Can anyone shed light on my problem.
Basically I have a Varitronic timed at 26 BTDC .The Scooter pulls well and cruises well. But descending hills on closed or almost closed throttle it jerks (sort of hunts?) as though it wants to stop (quite jerky).
I have increased the main jet from 73 to 80. Needle is in the bottom groove.
Is what I am doing wrong or is there anything else I could try?
Confused!!!
Now find its 32BTDC with my strobe ! Is this too much ?
What should Spark Plug setting be with a Varitronic ?