1987-2003 Yamaha YFZ350 Banshee supplementary service manual, Page 160Get this manual
WATER PUMP
1proceed as screws particularly case
After warming up the engine, follows: Retighten the pump cover specificationCheck for coolant leakage, leakage into the transmission
12Inspect: Cooling system Decrease of pressure (leaks)+Repair as requiredRefer "RADIATOR-INSPECTION" section