| Model (Horsepower) | CH & CV25 (25) | ||
| General | Kilowatt (kW) Output (@ 3600 RPM - SAE J1349) | 18.6 | |
| Horsepower (@3600RPM- SAE J1349) | 25 | ||
| Bore | 83 (3.27) | ||
| Stroke | 67 (2.64) | ||
| Displacement | 725 cm3 (44 in.3) | ||
| Camshaft | End Play (With Shims) | 0.076/0.127 (0.003/0.005) | |
| Bore I.D. Max. Wear Limit | In Crankcase | 20.038 (0.7889) | |
| Camshaft Bearing Surface O.D. - Max. Wear Limit |
Oil Pan End | 19.959 (0.7858) | |
| Connecting Rod |
Connecting
Rod to Crankpin Running Clearance |
New | 0.030/0.055 (0.0012/0.0022) |
| Max. Wear Limit | 0.07 (0.0025) | ||
| Crankshaft | End Play (Free) | 0.070/0.480 (0.0028/0.0189) | |
| End Play (With Thrust Bearing Components) | 0.050/0.5 (0.0020/0.0197) | ||
| End Play (CH25 below Serial No. 2403500008) | 0.050/0.75 (0.0020/0.0295) | ||
| Crankshaft Main Bearing I.D. - Max. Wear Limit | 41.016 (1.6148) | ||
| Crankshaft to Main Bearing Running Clearance - New | 0.03/0.09 (0.0012/0.0035) | ||
| Crankshaft Bore to Crankshaft Running Clearance - New | 0.039/0.074 (0.0015/0.0029) | ||
| Main Bearing Journals | O.D. - New | 40.913/40.935 (1.6107/1.6116) | |
| O.D. - Max. Wear Limit | 40.84 (1.608) | ||
| Max. Taper | 0.022 (0.0009) | ||
| Max. Out of Round | 0.025 (0.0010) | ||
| Connecting Rod Journal | O.D. - New | 35.955/35.973 (1.4156/1.4163) | |
| O.D. - Max. Wear Limit | 35.94 (1.415) | ||
| Max. Taper | 0.018 (0.0007) | ||
| Max. Out of Round | 0.025 (0.0010) | ||
| Cylinder Bore | Cylinder Bore I.D. | New | 82.988/83.013 (3.2672/3.2682) |
| Max. Wear Limit | 83.051 (3.2697) | ||
| Max. Out of Round | 0.12 (0.0047) | ||
| Max. Taper | 0.05 (0.0020) | ||
| Cylinder Head | Max. Out of Flatness | 0.076 (0.003) | |
| Governor | Governor Cross Shaft OD. - Max. Wear Limit | 5.962 (0.2347) | |
| Governor Gear Shaft O.D. - Max. Wear Limit | 5.977 (0.2353) | ||
| Governor Cross Shaft Bore (In Crankcase) I.D. - Max. Wear Limit | 6.063 (0.2387) | ||
| Model (Horsepower) | CH & CV25 (25) | ||
| Ignition | Spark Plug Type (Champion or Equivalent) | RC12YC | |
| Spark Plug Gap | 0.76 (0.030) | ||
| Ignition Module Air Gap | 0.2/0.3 (0.008/0.012) | ||
 Pistons, |
Top Compression Ring to Groove side Clearance | 0.025/0.048 (0.0010/0.0019) | |
| Middle Compression Ring to Groove Side Clearance | 0.015/0.037 (0.0006/0.0015) | ||
| Oil Control Ring to Groove Side Clearance | 0.026/0.176 (0.0010/0.0070) | ||
| Piston Ring End Gap | New Bore | 0.25/0.56 (0.0100/0.0224) | |
| Used Bore (Max.) | 0.94 (0.037) | ||
| Piston Thrust
Face1 (@D1) to Cylinder Bore |
O.D. - New1 | 82.986 (3.2672) | |
| O.D. - Max. Wear Limit1 | 82.841 (3.2615) | ||
| New - Running Clearance | 0.002/0.045 (0.001/0.0018) | ||
| Valves and Valve Lifters |
Intake Valve Guide | I.D. - Std. | 7.038/7.058 (0.2771/0.2779) |
| I.D. - Max. Wear Limit | 7.134 (0.2809) | ||
| Exhaust Valve Guide | I.D. - Std. | 7.038/7.058 (0.2771/0.2779) | |
| I.D. - Max. Wear Limit | 7.159 (0.2819) | ||
| Intake Valve Minimum Lift | 8.07 (0.3177) | ||
| Exhaust Valve Minimum Lift | 8.07 (0.3177) | ||
| Nominal Valve Seat AngIe | 45o | ||
| Hydraulic Lifter to Crankcase Running Clearance | 0.0124/0.0501 (0.0005/0.0020) | ||
| Intake Valve stem to Valve Guide Running Clearance | 0.038/0.076 (0.0015/0.0030) | ||
| Exhaust Valve stem to Valve Guide Running Clearance | 0.050/0.088 (0.0020/0.0035) | ||