Kawasaki Ninja Service Manual: Valve Seat Inspection

Kawasaki Ninja Service Manual / Engine Top End / Valves / Valve Seat Inspection

Remove the valve (see Valve Removal).
Check the valve seating surface [A] between the valve [B] and valve seat [C].

Measure the outside diameter [D] of the seating pattern on the valve seat.

If the outside diameter is too large or too small, repair the seat (see Valve Seat Repair).

Valve Seating Surface Outside Diameter Standard:

Exhaust 23.9 24.1 mm (0.941
0.949 in.)

Intake 30.4 30.6 mm (1.197
1.205 in.)

Valve Seat Inspection

Measure the seat width [E] of the portion where there is no build-up carbon (white portion) of the valve seat with a vernier caliper.

Good [F]

If the width is too wide [G], too narrow [H] or uneven [J], repair the seat (see Valve Seat Repair).

Valve Seating Surface Width Standard:

Exhaust 0.8 1.2 mm (0.03
0.05 in.)

Intake 0.5 1.0 mm (0.02
0.04 in.)

Valve-to-Guide Clearance Measurement (Wobble Method)

If a small bore gauge is not available, inspect the valve guide wear by measuring the valve to valve guide clearance with the wobble method as indicated below. Insert a new valve [A] into the gu ...

Valve Seat Repair

Repair the valve seat with the valve seat cutters [A]. Special Tools - Valve Seat Cutter Holder Bar [B]: 57001 -1128 Valve Seat Cutter Holder, 4.5 [C]: 57001 -1330 [For Exhaust Valve Seat] V ...

Other materials:

Brake Hose and Pipe Replacement
NOTICE Brake fluid quickly ruins painted plastic surfaces; any spilled fluid should be completely washed away immediately. Remove: Upper Fairing Assembly (see Upper Fairing Assembly Removal in the Frame chapter) Brake Hose Fitting Bolt [A] Brake Hose Banjo Bolts [B] Bolt [C] Clamp ...

Valve Guide Removal
Remove: Valve (see Valve Removal) Oil Seal Spring Seat Heat the area around the valve guide to 120 150°C (248 302°F), and hammer lightly on the valve guide arbor [A] to remove the guide from the top of the head. NOTICE Do not heat the cylinder head with a torch. This ...

Coolant Temperature Meter
The coolant temperature gauge indicates temperature of the engine coolant. The “ ” symbol is displayed if the coolant temperature meter is selected. A. Coolant Temperature Meter B. Warning Indicator Light (Red) C. “ ” Symbol If the coolant temperature is below 40°C (104°F ...