2000 Yamaha YFM400FWA(M) Factory Service workshop Manual, Page 211Get this manual
COOL CHAPTER 5COOLING SYSTEM
RADIATOR .5-1 RADIATOR INSPECTION 5-3 RADIATOR INSTALLATION .5-4 THERMOSTAT 5-5 THERMOSTAT INSPECTION .5-6 THERMOSTAT INSTALLATION .5-6 WATER PUMP .5-7 WATER PUMP DISASSEMBLY 5-9 WATER PUMP INSPECTION 5-9 WATER PUMP ASSEMBLY 5-10