Kawasaki STX-15F service manual Camshaft, Camshaft Cap Wear, Camshaft Runout

6-18 ENGINE TOP END

Camshaft, Camshaft Chain

Camshaft, Camshaft Cap Wear

•Cut strips of plastigage (press gauge) to journal width. Place a strip on each journal parallel to the camshaft in- stalled in the correct position.

•Measure each clearance between the camshaft journal and the camshaft cap using plastigage [A].

•Tighten:

Torque - Camshaft Cap Bolts: 12 N·m (1.2 kgf·m, 104 in·lb) Upper Camshaft Chain Guide Bolts: 12 N·m (1.2

kgf·m, 104 in·lb)

NOTE

○Do not turn the camshaft when the plastigage is be- tween the journal and camshaft cap.

Camshaft Journal, Camshaft Cap Clearance

Standard:	0.028 ∼ 0.071 mm (0.0011 ∼ 0.0028 in.)
Service Limit:	0.16 mm (0.006 in.)

If any clearance exceeds the service limit, measure the diameter of each camshaft journal with a micrometer.

Camshaft Journal Diameter

Standard: 23.950 ∼ 23.972 mm (0.9429 ∼ 0.9438 in.)

Service Limit: 23.92 mm (0.942 in.)

If the camshaft journal diameter is less than the service limit, replace the camshaft with a new one and measure the clearance again

If the clearance still remains out of the limit, replace the cylinder head with camshaft cap.

Camshaft Runout

•Remove the camshaft (see Camshaft Removal).

•Set the camshaft on V blocks.

•Measure runout with a dial gauge at the specified place as shown.

If the runout exceeds the service limit, replace the camshaft.

Camshaft Runout
Standard:	TIR 0.02 mm (0.0008 in.) or less
Service Limit:	TIR 0.1 mm (0.004 in.)

Cam Wear
•Remove the camshaft (see Camshaft Removal).
•Measure the height [A] of each cam with a micrometer.
	If the cams are worn down past the service limit, replace
	the camshaft.
	Cam Height
	Standard:
	Exhaust	36.143 ∼	36.257 mm (1.4229 ∼	1.4274 in.)
	Inlet	36.440 ∼	36.554 mm (1.4346 ∼	1.4391 in.)
	Service Limit:
	Exhaust	36.04 mm (1.419 in.)
	Inlet	36.34 mm (1.431 in.)