I filled up with good synthetic 2T oil before a 10 mile "thrash" (!) at 40 and 50 mph (some steep hills) and checked the oil level again after: seems I used 3/4 of the quantity of oil in the filler pipe. Petrol gauge - no massive fuel drop.
Surely that is too much oil used? I also couldn't start the scooter for the return thrash without cleaning the plug which was very wet sooty. (choke was off).
Lack of light prevented me from checking the air filter and mixture setting or removing the carb lid, but i have long suspected something wrong with the oil delivery.
If I read the other posts correctly there is no adjustment of the dosing rate (I appreciate it is attached to the throttle but 50mph is hardly caning it...), is that so? Are 2T oil leaks into the cylinder likely?
Any thoughts please?