Motor Top End Specifications
| S Series | S1, KH250 | S2 | S3, KH400 | |||
| Standard | Service Limit | Standard | Service Limit | Standard | Service Limit | |
| Bore Diameter | 45.106mm 1.772in. |
45.15mm 1.778in. |
53.000-53.019mm 2.0866-2.0873in. |
53.15mm 2.0925in. |
57.0-57.019mm 2.2441-2.2448in. |
57.15mm 2.250in. |
| Bore Taper and out-of-round. (Max) | 0.05mm 0.002in. |
0.05mm 0.002in. |
0.05mm 0.002in. |
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| Piston Skirt Diameter (5mm from bottom of skirt at right angle to piston pin |
44.975mm 1.7707in. |
+0.005/-0.025mm +0.0002/-0.001in. |
52.975mm 2.0856in. |
+0.005/-0.025mm +0.0002/-0.001in. |
56.934mm 2.2415in. |
+0.005/-0.025mm +0.0002/-0.001in. |
| Piston-to-Cylinder Clearance *Eng# 0~04593 |
0.012-0.020mm 0.0005-0.0008in. |
*0.021-0.029mm *0.0008~0.0011in |
0.027-0.035mm 0.0011-0.0014in. |
0.078-0.086mm 0.0031-0.0034in. |
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| Top Piston Ring-to-groove Clearance | 0.09-0.13mm 0.0035-0.0051in. |
0.17mm 0.0067in. |
0.09-0.13mm 0.0035-0.0051in. |
0.17mm 0.0067in. |
0.09-0.13mm 0.0035-0.0051in. |
0.17mm 0.0067in. |
| Bottom Piston Ring-to-groove Clearance | 0.05-0.09mm 0.0020-0.0035in. |
0.12mm 0.0047in. |
0.05-0.09mm 0.0020-0.0035in. |
0.12mm 0.0047in. |
0.05-0.09mm 0.0020-0.0035in. |
0.12mm 0.0047in. |
| Thickness | Width | Thickness | Width | Thickness | Width | |
| Top Piston Ring Dimensions | 1.47-1.49mm 0.0579-0.0595in. |
2.0-2.2mm 0.0787-0.0866in. |
1.47-1.49mm 0.0579-0.0595in. |
2.2-2.4mm 0.0866-0.0945in. |
1.47-1.49mm 0.0579-0.0595in. |
2.3-2.5mm 0.0905-0.0985in. |
| Bottom Piston Ring Dimensions | 1.47-1.49mm 0.0579-0.0595in. |
2.0-2.2mm 0.0787-0.0866in. |
1.47-1.49mm 0.0579-0.0595in. |
2.2-2.4mm 0.0866-0.0945in. |
1.47-1.49mm 0.0579-0.0595in. |
1.9-2.1mm 0.0747-0.0827in. |
| Height | Depth | Height | Depth | Height | Depth | |
| Top Piston Ring Groove Dimensions | 1.58-1.60mm 0.0622-0.0630in. |
2.466-2.566mm 0.0971-0.1010in. |
1.58-1.60mm 0.0622-0.0630in. |
2.4-2.6mm 0.0945-0.1024in. |
1.58-1.60mm 0.0622-0.0630in. |
2.591-2.641mm 0.1019-0.1040in. |
| Bottom Piston Ring Groove Dimensions | 1.54-1.56mm 0.0607-0.0615in. |
2.466-2.566mm 0.0971-0.1010in. |
1.54-1.56mm 0.0607-0.0615in. |
2.4-2.6mm 0.0945-0.1024in. |
1.54-1.56mm 0.0607-0.0615in. |
2.591-2.641mm 0.1019-0.1040in. |
| Standard | Service Limit | Standard | Service Limit | Standard | Service Limit | |
| Piston Ring End Gap | 0.2-0.3mm 0.008-0.0120in. |
0.8mm 0.031in. |
0.2-0.3mm 0.008-0.0120in. |
0.8mm 0.031in. |
0.15-0.35mm 0.006-0.014in. |
0.7mm 0.028in. |
| Top Ring Free End Gap | 6.0mm 0.24in. |
6.5mm 0.256in. |
6.0mm 0.24in. |
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| Bottom Ring Free End Gap | 6.0mm 0.24in. |
6.5mm 0.256in. |
8.5mm 0.335in. |
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| Wrist Pin Bearing Radial Clearance | 0.003-0.022mm 0.00012-0.00088in. |
0.10mm 0.0039in. |
0.003-0.022mm 0.00012-0.00088in. |
0.10mm 0.0039in. |
0.003-0.022mm 0.00012-0.00088in. |
0.10mm 0.0039in. |
| Connecting Rod Side Clearance | 0.40-0.50mm 0.0157-0.0197in. |
0.70mm 0.0276in. |
0.40-0.50mm 0.0157-0.0197in. |
0.70mm 0.0276in. |
0.40-0.50mm 0.0157-0.0197in. |
0.70mm 0.0276in. |
| Connecting Rod Radial Clearance | 0.025-0.035mm 0.0001-0.0014in. |
0.10mm 0.004in. |
0.025-0.035mm 0.0001-0.0014in. |
0.10mm 0.004in. |
0.024-0.034mm 0.00095-0.00134in. |
0.10mm 0.0039in. |
| Crankshaft Runout | Less than 0.04mm 0.0016in. |
0.10mm 0.0039in. |
Less than 0.04mm 0.0016in. |
0.10mm 0.0039in. |
Less than 0.04mm 0.0016in. |
0.10mm 0.0039in. |
| H Series | H1, KH500 | H2 | ||
| Standard | Service Limit | Standard | Service Limit | |
| Bore Diameter | 60.0-60.019mm 2.3622-2.3629in. |
60.15mm 2.3681in. |
71.0-71.019mm 2.7953-2.7960in. |
71.15mm 2.8012in. |
| Bore Taper and out-of-round. (Max) | 0.05mm 0.002in. |
0.05mm 0.002in. |
||
| Piston Skirt Diameter (5mm from bottom of skirt at right angle to piston pin |
59.975mm 2.36122in. |
70.946mm 2.79314in. |
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| Piston-to-Cylinder Clearance |
0.062-0.700mm 0.0022-0.0028in. |
0.070-0.078mm 0.0028 -0.0031in. |
||
| Top Piston Ring-to-groove Clearance | 0.09-0.13mm 0.0035-0.0051in. |
0.17mm 0.0067in. |
0.09-0.13mm 0.0035-0.0051in. |
0.17mm 0.0067in. |
| Bottom Piston Ring-to-groove Clearance | 0.05-0.09mm 0.0020-0.0035in. |
0.12mm 0.0047in. |
0.05-0.09mm 0.0020-0.0035in. |
0.12mm 0.0047in. |
| Thickness | Width | Thickness | Width | |
| Top Piston Ring Dimensions | 1.47-1.49mm 0.0579-0.0595in. |
2.4-2.6mm 0.0944-0.1024in. |
1.47-1.49mm 0.0579-0.0595in. |
2.9-3.1mm 0.0114-0.122in. |
| Bottom Piston Ring Dimensions | 1.47-1.49mm 0.0579-0.0595in. |
1.8-2.0mm 0.0708-0.0788in. |
1.47-1.49mm 0.0579-0.0595in. |
2.6-2.8mm 0.102-0.110in. |
| Height | Depth | Height | Depth | |
| Top Piston Ring Groove Dimensions | 1.58-1.60mm 0.0622-0.0630in. |
2.6-2.8mm 0.1024-0.1102in. |
1.58-1.60mm 0.0622-0.0630in. |
3.13-3.33mm 0.1233-0.1311in. |
| Bottom Piston Ring Groove Dimensions | 1.54-1.56mm 0.0607-0.0615in. |
2.6-2.8mm 0.1024-0.1102in. |
1.54-1.56mm 0.0607-0.0615in. |
3.13-3.33mm 0.1233-0.1311in. |
| Standard | Service Limit | Standard | Service Limit | |
| Top Ring End Gap | 0.2-0.3mm 0.008-0.012in. |
0.8mm 0.031in. |
0.2-0.4mm 0.008-0.016in. |
0.8mm 0.031in. |
| Bottom Ring End Gap | 0.2-0.3mm 0.008-0.012in. |
0.8mm 0.031in. |
0.2-0.4mm 0.008-0.016in. |
0.8mm 0.031in. |
| Top Ring Free End Gap | 7.0mm 0.276in. |
8.0mm 0.315in. |
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| Bottom Ring Free End Gap | 9.5mm 0.374in. |
8.0mm 0.315in. |
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| Wrist Pin Bearing Radial Clearance | 0.003-0.022mm 0.00012-0.00088in. |
0.10mm 0.0039in. |
0.003-0.022mm 0.00012-0.00088in. |
0.10mm 0.0039in. |
| Connecting Rod Side Clearance | 0.40-0.50mm 0.0157-0.0197in. |
0.70mm 0.0276in. |
0.40-0.50mm 0.0157-0.0197in. |
0.70mm 0.0276in. |
| Connecting Rod Radial Clearance | 0.025-0.035mm 0.00098-0.00138in. |
0.10mm 0.0039in. |
0.025-0.035mm 0.00098-0.00138in. |
0.10mm 0.0039in. |
| Crankshaft Runout | Less than 0.04mm 0.0016in. |
0.10mm 0.0039in. |
Less than 0.04mm 0.0016in. |
0.10mm 0.0039in. |
Connecting Rod Lengths
| Length (ctr-ctr) | Inside-Inside | Big End | Small End | |
| S Series |
100.051mm 3.939in. |
76.556mm 3.014in. |
27.991mm 1.102in. |
18.999mm 0.748in. |
| H1 |
109.995mm 4.331in. |
84.684mm 3.334in. |
30.632mm 1.206in. |
19.990mm 0.787in. |
| H2 |
120.002mm 4.725in. |
91.999mm 3.622in. |
35.001mm 1.378in. |
21.006mm 0.827in. |