Specifications

Item	Standard
Coolant Provided when Shipping Type (Recommended) Color Mixed Ratio Freezing Point Total Amount	Permanent type of antifreeze (soft water and ethylene glycol plus corrosion and rust inhibitor chemicals for aluminum engines and radiators) Green Soft water 50%, coolant 50% −35°C (−31°F) 1.2 L (1.3 US qt) (reserve tank full level, including radiator and engine)
Radiator Cap Relief Pressure	112.3  141.7 kPa (1.15  1.45 kgf/cm², 16.3  20.5 psi)
Thermostat Valve Opening Temperature Valve Full Opening Lift	80.5  83.5°C (177  182°F) 8 mm (0.31 in.) or more at 95°C (203°F)

Special Tools

Bearing Driver Set: 57001-1129

Oil Seal Driver: 57001-1660

Coolant

Coolant Deterioration Inspection

_• Remove the right center fairing (see Center Fairing Re- moval in the Frame chapter).

_• Visually inspect the coolant [A] in the reserve tank.

If whitish cotton-like wafts are observed, aluminum parts

in the cooling system are corroded. If the coolant is brown, iron or steel parts are rusting. In either case, flush the cooling system.

If the coolant gives off an abnormal smell, check for a cooling system leak. It may be caused by exhaust gas leaking into the cooling system.

Coolant Level Inspection

_• Refer to the Coolant Level in the Periodic Maintenance chapter.

Coolant Draining

_• Refer to the Coolant Change in the Periodic Maintenance chapter.

Coolant Filling

_• Refer to the Coolant Change in the Periodic Maintenance chapter.

Pressure Testing

_• Remove the reserve tank (see Coolant Change in the Pe- riodic Maintenance chapter).

_• Remove the radiator cap, and install a cooling system

pressure tester [A] on the filler neck [B].

NOTE

○^{Wet the cap sealing surfaces with water or coolant to}

prevent pressure leaks.

_• Build up pressure in the system carefully until the pres- sure reaches 141.7 kPa (1.45 kgf/cm², 20.5 psi).

_• Watch the gauge for at least 6 seconds.

If the pressure holds steady, the system is all right.

If the pressure drops and no external source is found, check for internal leaks. Droplets in the engine oil indicate internal leakage. Check the cylinder head gasket and the water pump.

_• Remove the pressure tester, replenish the coolant, and

install the radiator cap.

Coolant

Cooling System Flushing

Over a period of time, the cooling system accumulates rust, scale, and lime in the water jacket and radiator. When this accumulation is suspected or observed, flush the cool- ing system. If this accumulation is not removed, it will clog up the water passage and considerable reduce the effi- ciency of the cooling system.

_• Drain the cooling system (see Coolant Change in the Pe-

riodic Maintenance chapter).

_• Fill the cooling system with fresh water mixed with a flush- ing compound.

_• Warm up the engine, and run it at normal operating tem- perature for about ten minutes.

_• Stop the engine, and drain the cooling system.

_• Fill the system with fresh water.

_• Warm up the engine and drain the system.

_• Repeat the previous two steps once more.

_• Fill the system with a permanent type coolant and bleed

the air from the system (see Coolant Change in the Peri-

odic Maintenance chapter).

Coolant Reserve Tank Removal/Installation

_• The coolant reserve tank is removed and installed dur- ing coolant change (see Coolant Change in the Periodic

Maintenance chapter).

Water Pump Removal

_• Drain the coolant (see Coolant Change in the Periodic Maintenance chapter).

_• Loosen the clamp and remove the radiator hose [A] from

the water pump cover [B].

_• Remove the water pump cover bolts [C].

_• Shift the transmission into 1st gear.

_• While applying the rear brake, remove the water pump

impeller bolt [A].

_• Remove: Impeller [B]

Water Pump Housing [C]

Water Pump Installation

_• When installing the water pump impeller bolt, shift the transmission into 1st gear and apply the rear brake.

_• Replace the O-rings [A] on the water pump housing with

new ones and apply grease them.

_• Apply high-temperature grease to the lips of the water pump housing oil seal [B].

_• Be sure that the dowel pin [A] is in position.

_• Install the water pump housing.

_• Tighten:

Torque - Water Pump Impeller Bolt: 9.8 N·m (1.0 kgf·m, 87 in·lb)

_• Replace the O-ring [A] on the water pump cover with a new one and grease it.