The engine is running rich and the excess fuel is seeping through the piston cylinder into the oil reservoir. Probably time for a good tune up: new spark plug(s) air and fuel filter chage, etc., maybe even a carburetor adjustment.
Dr. Patrick Mohateny
10.1
The air cooling of a 4 stroke petrol engine takes when the air flows on the engine .it takes not by radiation.
a 125cc varies between 65-85mph with a four stroke engine, and 65-up to 100mph with a two stroke
Fuel is fuel. The fuel only changes when you add 2 stroke oil to it. You can burn it in a 4 stroke engine, might smoke some, but it is not recommended for your normal outing.
You can't harm the engine but you can fowl sparkplugs quite easily. More common on 2 stroke bikes.
The Aprilia RS50 motorbike is a wonderful machine. It comes complete with a 50cc engine (two stroke, single cylinder, and liquid cooled). It also reaches speeds of 30MPH.
Indian
on my suzuki gs 500 e motorbike you dont mix oil and gas its a four stroke engine
Yes. Use same mix ratio.
any 50cc four stroke you like or even the ktm 50 2-stroke.
no no no no worst thing you can do to a 2 stroke