Kawasaki J300 - Service manual > Rocker Arm, Rocker Shaft

Rocker Arm Removal

• Remove:
  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 rocker arm.
  • 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 fits.

  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.

See also: