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26 TECHNICAL DATA
259
26.2
Engine tolerance, wear limits
Camshafts - diameter, bearing pin
> 39.95 mm (> 1.5728 in)
Next to exhaust cam
Next to inlet cam
> 17.96 mm (> 0.7071 in)
Valve spring
Minimum length (without valve spring cap)
42.3 mm (1.665 in)
2.4... 2.5 mm (0.094... 0.098 in)
Valve spring cap - thickness
Valve - valve stem diameter
Exhaust
> 5.93 mm (> 0.2335 in)
Intake
> 5.93 mm (> 0.2335 in)
Valve guide - diameter
6.004... 6.016 mm (0.23638... 0.23685 in)
New condition
Wear limit
6.050 mm (0.23819 in)
Valve - sealing seat width
1.60 mm (0.063 in)
Intake
2.00 mm (0.0787 in)
Exhaust
Valve - run-out
On the valve plate
< 0.05 mm (< 0.002 in)
On the valve stem
< 0.05 mm (< 0.002 in)
Cylinder/cylinder head - sealing area distortion
< 0.10 mm (< 0.0039 in)
Cylinder - bore diameter
Size I
105.000... 105.012 mm (4.13385... 4.13432 in)
Size II
105.013... 105.025 mm (4.13436... 4.13483 in)
Piston - diameter
Size I
104.955... 104.965 mm (4.13208... 4.13247 in)
Size II
104.965... 104.975 mm (4.13247... 4.13287 in)
Piston/cylinder - mounting clearance
New condition
0.035... 0.060 mm (0.00138... 0.00236 in)
0.10 mm (0.0039 in)
Wear limit
< 0.08 mm (< 0.0031 in)
Piston ring - groove clearance
Piston ring end gap
Compression rings
< 0.80 mm (< 0.0315 in)
Oil scraper ring
< 1.00 mm (< 0.0394 in)
20.010... 20.020 mm (0.78779... 0.78819 in)
Piston - piston pin hole diameter
19.995... 20.004 mm (0.7872... 0.78756 in)
Piston pin - diameter
Connecting rod - axial clearance of lower conrod bearing
0.30... 0.60 mm (0.0118... 0.0236 in)
Connecting rod - radial clearance of lower conrod bearing
0.05 mm (0.002 in)
Crankshaft - axial clearance
0.15... 0.25 mm (0.0059... 0.0098 in)
< 0.10 mm (< 0.0039 in)
Crankshaft run-out at bearing pin
0.05... 0.20 mm (0.002... 0.0079 in)
Balancer shaft axial clearance
Clutch facing disc - thickness
> 2.5 mm (> 0.098 in)
Intermediate disk - thickness
> 1.35 mm (> 0.0531 in)
Clutch spring - length
31.5... 33.5 mm (1.24... 1.319 in)
Clutch basket - contact surface of clutch facing discs
< 0.5 mm (< 0.02 in)
Oil pressure regulator valve - minimum spring length
25.4 mm (1 in)
Oil pump
Clearance between external rotor and engine case
< 0.20 mm (< 0.0079 in)
Clearance between external rotor and internal rotor
< 0.20 mm (< 0.0079 in)
0.04... 0.08 mm (0.0016... 0.0031 in)
Axial clearance
Engine oil pressure
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