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:

Radiator Fan Relay Inspection
Refer to the Relay Circuit Inspection in the Electrical System chapter If the radiator fan relay is normal, check the wiring for continuity, using the wiring diagram in this section. Special Tool - Hand Tester: 57001-1394 If the wiring is good, check the ECU for its ground and power supp ...

Engine Oil Change
Situate the motorcycle so that it is vertical after warming up the engine. Remove the engine oil drain bolt [A] to drain the oil. The oil in the oil filter can be drained by removing the filter (see Oil Filter Replacement). Replace the drain bolt gasket [B] with a new one. Tighten t ...

Lower Fairing Removal
Remove the quick rivets [A]. Remove: Quick Rivets [A] Bolts [B] Pull up the core by the flat-head screwdriver (–), and then remove the quick rivet. Clear the hook portions on the upper edges [C] from the slots, and remove the left lower fairing [D]. While pulling down ...