z-star gear oil

[trevorzstar]

well were 3 weeks into owning our z-star 110 that I picked up for my boys.

Poking around I was concerned about the lack of oil coming out of the gear box when I pulled the plug and nothing came out. So did some looking, and thinking wtf...

I changed the motor oil in the quad, that went well. Then I added 500ml of gear oil to the other side, since none really came out when I removed the drain plug on that side. Took it for a ride with my son and came back and noticed that the oil from the gear box was draining and left a big puddle in the drive way.... so my question is, do we fill the gear case with oil, how much? is the gasket blown on the gear case. or do I just let them keep riding it.