The oil pump is run by the cam chain and the oil filter is a centrifugal built into the clutch so i dont know how i would be able to check for oil flow
It uses gaskets but i was in the water and so far found no moisture inside could be cause i didnt go in that deepFirst thing is to check the chain. Support the rear and slowly roll the rear wheels. See if there's any tight spots
in the chain. Could be seized links. Look at the sprocket teeth for wear too. If it isn't that check to see if each wheel spins smoothly. Maybe a failing wheel bearing.
The steering is probably worn tie rod ends or bad bearings in the steering stem. With the front off the ground push and pull on the wheel. Look for any slop in the steering rods. You may need new heim joints at the ends.
As far as the lights, I suspect you're really straining the charging system with those. Eventually the stator or rectifier
is going to burn out. Either use lower amperage lights or upgrade the charging system if you can. Probably a good idea to seal the stator cover if you can. Not sure if that uses a gasket on it.