Service Manual

5-4 ENGINE TOP END
Specifications
Item
Service Limit
Cylinder Head:
Cylinder compression (MIN)
[390 kPa (57 psi)] (MIN)
Cylinder head warp 0.03 mm (0.001 in.)
Valves:
Valve head thickness Intake, Exhaust 0.35 mm (0.014 in.)
Valve stem runout Intake, Exhaust 0.05 mm (0.002 in.)
Valve stem diameter Intake 5.95 mm (0.0234 in.)
Exhaust 5.93 mm (0.0233 in.)
Valve guide inside diameter Intake, Exhaust 6.08 mm (0.239 in.)
Valve spring free length Intake, Exhaust 31.5 mm (1.24 in.)
Rocker arm push rod rounout Intake, Exhaust 0.5 mm (0.02 in.)
Cylinder, Piston
Piston diameter 64.79 mm (2.551 in.)
Piston ring/groove clearance Top 0.18 mm (0.007 in.)
Second 0.18 mm (0.007 in.)
Piston ring thickness Top, Second 1.40 mm (0.055 in.)
Piston ring end gap Top 0.75 mm (0.029 in.)
Second 0.75 mm (0.029 in.)
Oil 1.05 mm (0.041 in.)
Piston pin outside diameter 15.96 mm (0.628 in.)
Piston pin hole inside diameter 16.08 mm (0.633 in.)
Connecting rod small end inside diameter 16.05 mm (0.632 in.)
Cylinder inside diameter: Standard Cylinder 65.10 mm (2.563 in.)
0.50 mm Oversize 65.60 mm (2.583 in.)
Cylinder bore out round 0.056 mm (0.0022 in.)
Item Standard
Valve clearance Intake, Exhaust 0.10 0.15 mm (0.004 0.006 in.)
Valve seating surface angle Intake, Exhaust 45

Valve seating surface width Intake, Exhaust 0.6 0.9 mm (0.024 0.035 in.)
Valves guide inside diameter Intake, Exhaust 6.00 6.012 mm
(0.2362 0.2367 in.)
Cylinder bore diameter standard cylinder
Standard cylinder 65.00 64.98 mm
(2.559 ~ 2.558 in.)
0.50 mm Over size 65.50 65.48 mm
(2.579 2.578 in.)
Special Tools - Compression Gauge : 57001 - 221
Compression Gauge Adapter M14 x 1.25: 57001–1159
Piston Ring Pliers: 57001 - 115
Piston Ring Compression Grip: 57001 - 1095
Piston Ring Compression Belt,
55 - 67: 57001–1096
Valve Seat Cutter Holder Bar: 57001–1128
Valve Seat Cutter Holder,
6: 57001–1360
Valve Seat Cutter, 45

- 27.5 : 57001-1114
Valve Seat Cutter, 32

- 28.0 : 57001-1119
Valve Seat Cutter, 32

- 25.0 : 57001-1118