3
1-3 Service limit
Unit: mm
Parts
Item
Standard
Service limit
Engine
Maximum speed (No load)
Cylinder compression
3800±100 rpm
1.15 Mpa at 1200 rpm
—
—
Cylinder head Sleeve I.D.
68.00–68.02
68.160
Cylinder head War page
0–0.05
0.100
Piston
Skirt O.D.
Piston-to cylinder clearance
Piston pin bore I.D.
Piston pin O.D.
Piston pin-to-piston pin bore clearance
67.989–67.971
0.011–0.049
16.004–16.01
15.994–16.00
0.004–0.016
67.850
0.120
16.450
15.940
0.060
Piston rings
Ring side clearance: first/second
Ring width: first/second
Ring end gap: first/second
0.04–0.08/0.04–0.08
2.60±0.10/2.70±0.10
0.13–0.28/0.20–0.40
0.150
2.300
1.000
Connecting
rod
Small end I.D.
Big end I.D.
Big oil clearance
Big end side clearance
16.005–16.021
30.000–30.018
0.019–0.049
0.4–0.7
16.090
30.066
0.120
1.100
Crankshaft
Crankshaft pin O.D.
29.969–29.981
29.910
Valve
Valve clearance
IN
EX
Stem O.D.
IN
EX
Guide I.D.
IN
EX
Stem clearance
IN
EX
Seat width
Spring free length
0.10–0.15
0.15–0.20
5.440–5.455
5.430–5.445
5.500–5.520
5.500–5.520
0.045–0.080
0.055–0.090
0.85
30.50
—
—
5.310
5.300
5.590
5.590
0.100
0.120
2.000
28.500
Camshaft
Cam height
IN
EX
Journal I.D.
23.98
27.88
9.00–9.04
23.730
27.630
9.090
Camshaft
spindle
camshaft spindle O.D.
8.96–8.98
8.910
Spark plug
Gap
0.7–0.8
—
Ignition coil
Resistance
Primary coil
Secondary coil
Air gap
(at flywheel)
0.8–1.0
Ω
5.9–7.2 k
Ω
0.40–0.60 mm
—
—
—
1-3 Service limit
Summary of Contents for MA190
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