hello eveyone, I just started to ride dirt bikes I'm a road bike kinda guy but I wanted to try somthing new so I went out and bought a 1992 yamaha yz250 but the guy I got it from told me I should change the trans. oil so I drained it and all that thinking their would be a window on it. but their ant no window! so I called the guy and he dont know how much to put in their eather.. so is their anyone that can help me out?? I cant ride till I get some oil in it.. should just guess and put like 1 quart in it or what?? plz help me I would really like that :cool: