Removal
Warning! Before starting work, ensure the motorcycle is stabilised and adequately supported. This will help prevent it from falling and causing injury to the operator or damage to the motorcycle.
1. Remove the rider's seat.
2. Disconnect the battery, negative (black) lead first.
3. Drain the coolant as described earlier.
Warning! Do not remove the coolant pressure cap when the engine is hot. When the engine is hot, the coolant inside the radiator is hot and also under pressure. Contact with hot coolant will cause scalds and skin damage.
4. Turn the steering to left or right full lock.
5. Disconnect the coolant hoses from the water pump.
1. Bottom radiator hose; 2. Pump outlet hose; 3. Water pump
6. Release the two lower bolts that secure the water pump to the crankcase.
Note: The third, upper bolt is the drain plug and also holds the water pump together.
7. Withdraw the water pump.
Inspection
1. Remove the pump outer cover to check for corrosion and scale build-up around the impellor and in the pump body. Renew if necessary.
2. Check the water pump shaft and shaft bearings for side and end float. Clean or renew if necessary.
3. Check the water pump gland for signs of leakage. Renew the pump if leakage is evident.
Installation
1. Replace the water pump O--ring seal.
1. O-ring seal
2. Align the drive slot in the water pump with the drive blade on the oil pump shaft (inside the crankcase).
Note: The water pump will not engage fully into the crankcase unless the drive slot and blade are aligned and engaged.
1. Water pump slot; 2. Oil pump shaft, drive blade
3. Fit the pump and tighten the fixings to 10 Nm.
4. Refit the hoses to the water pump and tighten the clips.
5. Reconnect the battery, positive (red) lead first.
6. Refit the rider's seat.
7. Refill the cooling system as described on page 12.7.