It looks bad, but I cannot say it is the cause. My main diagnostic tool is a hair die spray bottle.
Thanks, I will check it this summer (scooter is at my cabin)Off the top of my pointed, aged head, 135-140.
What ya got for compression?
Bring an adapter to compare the results with and without one. Expect the result to be higher without the adapter, but if it is higher with the adapter, then begin asking questions. You can reach further by listening to the speed of the engine while it is being cranked over to compare both sides. An abnormally low cranking speed should be the same side as the abnormally low compression. It probably sounds wrong, but too much blowby the rings works against the engine speed. It is somewhat like an engine without a flywheel.Thanks, I will check it this summer (scooter is at my cabin)