How can I change gear oil in Jonway Adventure 125CC? Please help?

I've got a Jonway Adventure 125CC. I want to know how i can change Gear Oil?How can I change gear oil in Jonway Adventure 125CC? Please help?
Aren't these automatic? I.e. CVT? So they don't have gears as such, so they don't have gear oil - I think. There may be some kind of lubrication system for the pulleys, but I doubt whether that would actually need changing as such. If they're not automatic, the gear oil is the same as the engine oil. Are you sure you don't wanna change the engine oil? Warm the engine up first, so the oil runs more easily. The drain plug will be on the underside of the motor. Put a big enough container under the motor, undo the plug, and drain the oil. REPLACE THE PLUG! Refill the motor with the specified quantity of oil.