Iv never had a three wheeler be for and it's lecking oil from the drive sprocket and I can't see where from and I don't know how to get to it. It has a high low gear switch can someone help me plz

 

Well...that machine is old...and the drive shaft is sealed so I'm guessing it needs a new seal. On some machines you can replace without having to drive them out...on others you need to split the case and drive/press out to replace. I'd give it a good bath, let dry, then run it a bit in a clean area (driveway) then trace the leak to it's source...you don't want to be replacing things you don't need too...