How much oil does a 1991 rm 125 take?

A 125 is usually 650ml it will say it on the side of your engine case. When you look at the tranny fluid on that bottle it will also give you the same amount. There should also be a check bolt on the side of the case that should let you know when there is enough oil, that is if your talking about the tranny oil. If your talking about the pre mix you should run 32:1 or 36:1 depending on your riding style whether its woods or moto