Well-Known Member
the mini bike maintenance book I have is from 1972, so it doesn't have the fox sundowner in it since they weren't made till later 1973, but it does have the arctic cats with the sachs 50/adx and 50/amax info, which I think that Fox was using the same engine (probably overstock leftovers)

It states the trans oil capacity is 250cc of ATF fluid in the 50cc engines. "transmission gearbox should be filled until oil reaches lower end of plug" of course what they show as the plug in the manual I would think you could only fill it till it starts dripping out. since its on the rear bottom side.