KTM 690 SMC 2008, Repair Manual

Page: 171 / 227

TECHNICAL DATA - TOLERANCE, WEAR LIMITS OF ENGINE
169
Camshafts - diameter, bearing pin
Next to exhaust cam
≥
39.95 mm (
≥
1.5728 in)
Next to inlet cam
≥
17.96 mm (
≥
0.7071 in)
Valve spring
Minimum length (without valve spring cap) 42.3 mm (1.665 in)
Valve spring cap - thickness 2.4… 2.5 mm (0.094… 0.098 in)
Valve - valve stem diameter
Exhaust
≥
5.93 mm (
≥
0.2335 in)
Intake
≥
5.93 mm (
≥
0.2335 in)
Valve guide - diameter
New condition 6.004… 6.016 mm (0.23638… 0.23685 in)
Wear limit 6.050 mm (0.23819 in)
Valve - sealing seat width
Intake 1.60 mm (0.063 in)
Exhaust 2.00 mm (0.0787 in)
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 102.000… 102.012 mm (4.01574… 4.01621 in)
Size II 102.013… 102.025 mm (4.01625… 4.01672 in)
Piston - diameter
Size I 101.955… 101.965 mm (4.01397… 4.01436 in)
Size II 101.965… 101.975 mm (4.01436… 4.01476 in)
Piston/cylinder - mounting clearance
New condition 0.035… 0.060 mm (0.00138… 0.00236 in)
Wear limit 0.10 mm (0.0039 in)
Piston ring - groove clearance
≤
0.08 mm (
≤
0.0031 in)
Piston ring end gap
Compression rings
≤
0.80 mm (
≤
0.0315 in)
Oil scraper ring
≤
1.00 mm (
≤
0.0394 in)
Piston - piston pin hole diameter 20.010… 20.020 mm (0.78779… 0.78819 in)
Piston pin - diameter 19.995… 20.004 mm (0.7872… 0.78756 in)
Connecting rod - axial clearance of lower conrod bearing 0.40… 0.60 mm (0.0157… 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)
Crankshaft run-out at bearing pin
≤
0.10 mm (
≤
0.0039 in)
Balancer shaft axial clearance 0.05… 0.20 mm (0.002… 0.0079 in)
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 cage - contact surface of clutch facing discs
≤
0.5 mm (
≤
0.02 in)
Oil pressure regulator valve - minimum spring length 27.5 mm (1.083 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)
Axial clearance 0.04… 0.08 mm (0.0016… 0.0031 in)
Engine oil pressure
Coolant temperature:
≥
70 °C (
≥
158 °F)
Engine speed: 1,500 rpm
≥
0.4 bar (
≥
6 psi)
Coolant temperature:
≥
70 °C (
≥
158 °F)
Engine speed: 5,000 rpm
≥
1.5 bar (
≥
22 psi)