Kawasaki STX-15F service manual Standard Service Limit Camshafts, Cylinder Head, Valves

6-6 ENGINE TOP END

Specifications

Item				Standard					Service Limit
Camshafts
Cam Height:
Exhaust	36.143 ∼			36.257 mm (1.4229 ∼				1.4274 in.)	36.04 mm (1.4189 in.)
Inlet	36.440 ∼			36.554 mm (1.4346 ∼				1.4391 in.)	36.34 mm (1.431 in.)
Camshaft Journal, Camshaft	0.028 ∼			0.071 mm (0.0011 ∼			0.0028 in.)		0.16 mm (0.006 in.)
Cap Clearance
Camshaft Journal Diameter	23.950 ∼			23.972 mm (0.9429 ∼				0.9438 in.)	23.92 mm (0.942 in.)
Camshaft Bearing Inside	24.000 ∼			24.021 mm (0.9449 ∼				0.9457 in.)	24.08 mm (0.948 in.)
Diameter
Camshaft Runout	TIR 0.02 mm (0.0008 in.) or less								TIR 0.1 mm (0.004 in.)
Cylinder Head
Cylinder Compression	(usable range)								– – –
	1 185∼		1 795 kPa (12.1 ∼			18.3 kgf/cm²,
	172 ∼	260 psi) @430 r/min. (rpm)
Cylinder Head Warp	– – –								0.05 mm (0.002 in.)
Valves
Valve Clearance:
Exhaust	0.22 ∼		0.31 mm (0.0087 ∼			0.0122 in.)			– – –
Inlet	0.15 ∼		0.24 mm (0.0059 ∼			0.0094 in.)			– – –
Valve Head Thickness:
Exhaust	0.8 mm (0.03 in.)								0.5 mm (0.02 in.)
Inlet	0.5 mm (0.02 in.)								0.25 mm (0.0098 in.)
Valve Stem Bend	TIR 0.01 mm (0.0004 in.) or less								TIR 0.05 mm (0.002 in.)
Valve Stem Diameter:
Exhaust	4.955 ∼			4.970 mm (0.1951 ∼			0.1957 in.)		4.94 mm (0.194 in.)
Inlet	4.975 ∼			4.990 mm (0.1959 ∼			0.1965 in.)		4.96 mm (0.195 in.)
Valve Guide Inside Diameter:
Exhaust	5.000 ∼			5.012 mm (0.1969 ∼			0.1973 in.)		5.07 mm (0.200 in.)
Inlet	5.000 ∼			5.012 mm (0.1969 ∼			0.1973 in.)		5.07 mm (0.200 in.)
Valve/valve Guide Clearance
(Wobble Method):
Exhaust	0.09 ∼		0.17 mm (0.0035 ∼			0.0067 in.)			0.35 mm (0.014 in.)
Inlet	0.03 ∼		0.11 mm (0.0012 ∼			0.0043 in.)			0.29 mm (0.011 in.)
Valve Seat Cutting Angle	45°, 32°, 60°, 55°								– – –
Valve Seating Surface:
Outside Diameter:
Exhaust	27.6 ∼		27.8 mm (1.087 ∼			1.094 in.)			– – –
Inlet	32.6 ∼		32.8 mm (1.283 ∼			1.291 in.)			– – –
Width:
Exhaust	0.8 ∼	1.2 mm (0.03 ∼			0.047 in.)				– – –
Inlet	0.5 ∼	1.0 mm (0.02 ∼			0.039 in.)				– – –
Valve Spring Free Length:
Exhaust (Inner)	38.08 mm (1.499 in.)								36.7 mm (1.445 in.)
Exhaust (Outer)	45.97 mm (1.810 in.)								44.3 mm (1.744 in.)
Inlet (Inner)	37.97 mm (1.495 in.)								36.5 mm (1.437 in.)