Kawasaki Ninja Service Manual: Radiator Cap Inspection

Kawasaki Ninja Service Manual / Cooling System / Radiator / Radiator Cap Inspection

Remove: Radiator Cap (see Coolant Change in the Periodic Maintenance chapter)
Check the condition of the bottom [A] and top [B] valve seals and valve spring [C].

If any one of them shows visible damage, replace the cap with a new one.

Radiator Cap Inspection

Install the cap [A] on a cooling system pressure tester [B].

NOTE

Wet the cap sealing surfaces with water or coolant to prevent pressure leaks.

Radiator Cap Inspection

Watching the pressure gauge, pump the pressure tester to build up the pressure until the relief valve opens: the gauge needle flicks downward. Stop pumping and measure leak time at once. The relief valve must open within the specified range in the table below and the gauge hand must remain within the same range at least 6 seconds.

Radiator Cap Relief Pressure Standard: 112 ∼ 142 kPa (1.14 ∼ 1.45 kgf/cm², 16 ∼ 21 psi)

If the cap can not hold the specified pressure or if it holds too much pressure, replace it with a new one.

Radiator Inspection

Remove the radiator (see Radiator and Radiator Fan Removal). Check the radiator core. If there are obstructions to air flow, remove them. If the corrugated fins [A] are deformed, carefully s ...

Radiator Filler Neck Inspection

Remove: Radiator Cap (see Coolant Change in the Periodic Maintenance chapter) Check the radiator filler neck for signs of damage. Check the condition of the top and bottom sealing seats [ ...

Other materials:

Maintenance and adjustment
The maintenance and adjustments outlined in this chapter must be carried out in accordance with the Periodic Maintenance Chart to keep the motorcycle in good running condition. The initial maintenance is vitally important and must not be neglected. With a basic knowledge of mechanics and the ...

Rear Sprocket Warp Inspection
Raise the rear wheel off the ground with the stand so that it will turn freely. Set a dial gauge [A] against the rear sprocket [B] near the teeth as shown in the figure, and rotate [C] the rear wheel to measure the sprocket runout (warp). The difference between the highest and lowest di ...

Operating Procedures
Clean the seat area carefully. Coat the seat with machinist’s dye. Fit a 45° cutter into the holder and slide it into the valve guide. Press down lightly on the handle and turn it right or left. Grind the seating surface only until it is smooth. NOTICE Do not grind the seat too ...