Kawasaki J300 - Service manual > Rocker Arm, Rocker Shaft
Rocker Arm Removal
Camshaft Sprocket (see Camshaft Sprocket Removal)
Rocker Shaft Stopper Bolt [A]
Rocker Shaft Stopper [B]
- Using the 5 mm (0.20 in.) bolt [A], remove the rocker shafts [B] and rocker arms [C].
Rocker Arm Installation
- Clean the rocker arms and rocker shafts with high flash-point solvent.
- Apply molybdenum disulfide oil solution to the rocker shaft outside and rocker arm cam parts.
- Turn the camshaft so that the cam lobes point downward.
- Install each rocker shaft to the cylinder head, inserting it into each
- The rocker arms have the "IN" [A] or "EX" [B] mark.
- Install the rocker shaft so that the screw thread faces outside.
- Install the rocker shaft stopper [A] so that the cut sides [B] of the rocker shafts fit the stopper.
- Apply a non-permanent locking agent to the threads of the rocker shaft
stopper bolt [C] and tighten it.
Torque - Rocker Shaft Stopper Bolt: 8.8 N*m (0.90 kgf*m, 78 in*lb)
- Install the removed parts (see appropriate chapters).
- Check and adjust the valve clearance (see Valve Clearance Inspection in the Periodic Maintenance chapter).
Rocker Arm and Rocker Shaft Wear Inspection
- Visually inspect the area on the rocker arm where the cam rubs.
If there is any damage or uneven wear, replace the arm.
- Measure the inside diameter [A] of each rocker arm.
Rocker Arm Inside Diameter
Standard: 10.000 - 10.015 mm (0.3937 - 0.3943 in.)
If it exceeds the standard, replace the rocker arm.
- Measure the outside diameter [A] of each rocker shaft where the rocker
Rocker Shaft Diameter
Standard: 9.972 - 9.987 mm (0.3926 - 0.3932 in.)
If the diameter is less than the standard, replace the rocker shaft.
Camshaft Removal Remove: Camshaft Sprocket (see Camshaft Sprocket Removal) Rocker Arms (see Rocker Arm Removal) Camshaft [A]
Cylinder Compression Measurement Remove the left side fairing (see Side Fairing Removal in the Frame chapter). Warm up the engine thoroughly. Stop the engine. Remove the spark plug (see Spark Plug Replacement in the Periodic Maintenance chapter). Attach the compression gauge [A] and adapter [B] firmly into the spark plug hole.