2000 Yamaha YFM400FWA(M) Factory Service workshop Manual, Page 102Get this manual
DIFFERENTIAL GEAR OIL REPLACEMENT CONSTANT VELOCITY JOINT DUST BOOT INSPECTION STEERING SYSTEM INSPECTION
INSP ADJ
4.Drain: Differential gear oil 5.Install: 10 Nm (1.0 kg, ft lb) Drain plug NOTE: Check the gasket (drain plug)If it is damaged, replace it with new one6.Fill: Differential gear case Periodic oil change: 0.35 (0.31 Imp qt, 0.37 US qt) Total amount: 0.40 (0.35 Imp qt, 0.42 US qt) Recommended oil: SAE 80 API "GL-4" Hypoid gear oil NOTE: If gear oil is filled to the brim of the oil filler hole, oil may start leaking from the differential gear case breather hoseTherefore, check the quantity of the oil, not its levelTR