2-3
HRN216 SERVICE INFORMATION
4. SERVICE SPECIFICATIONS
Unit: mm (in)
Part Item Standard Service limit
Engine Maximum governed speed 3,100 +0/-150 rpm -
Cylinder compression
0.50 MPa (5.1 kgf/cm
2
, 73 psi)/600 rpm
-
Valves Valve clearance IN/EX 0.10 ± 0.02 (0.004 ± 0.001) -
Valve stem O.D. IN/EX 5.465 - 5.480 (0.2152 - 0.2157) 5.318 (0.2094)
Valve guide I.D. IN 5.500 - 5.512 (0.2165 - 0.2170) 5.572 (0.2194)
EX 5.540 - 5.552 (0.2181 - 0.2186) 5.612 (0.2209)
Seat width IN/EX 0.7 - 0.9 (0.03 - 0.04) 1.8 (0.07)
Valve spring free length IN/EX 30.5 (1.20) 29.0 (1.14)
Cam pulley Cam height IN/EX 33.779 - 34.179 (1.3299 - 1.3456) 34.328 (1.3515)
Cam pulley I.D. 10.090 - 10.120 (0.3972 - 0.3984) 10.140 (0.3992)
Rocker arm Rocker arm I.D. 6.000 - 6.030 (0.2362 - 0.2374) 6.043 (0.2379)
Rocker arm shaft O.D. 5.960 - 5.990 (0.2346 - 0.2358) 5.953 (0.2344)
Rocker arm shaft bearing I.D. 6.000 - 6.018 (0.2362 - 0.2369) 6.043 (0.2379)
Cylinder Sleeve I.D. 60.000 - 60.015 (2.3622 - 2.3628) 60.165 (2.3687)
Piston Skirt O.D. 59.970 - 59.990 (2.3610 - 2.3618) 59.85 (2.3563)
Piston-to-cylinder clearance 0.010 - 0.045 (0.0004 - 0.0018) 0.085 (0.0033)
Piston pin bore I.D. 13.002 - 13.016 (0.5119 - 0.5124) 13.048 (0.5137)
Piston pin Pin O.D. 12.994 - 13.000 (0.5116 - 0.5118) 12.954 (0.5100)
Piston rings Ring width Top 0.935 - 0.950 (0.0368 - 0.0374) 0.890 (0.0350)
Second 0.975 - 0.990 (0.0384 - 0.0390) 0.930 (0.0366)
Oil 2.380 - 2.460 (0.0937 - 0.9685) 2.370 (0.0933)
Ring side clearance Top 0.055 - 0.089 (0.0022 - 0.0035) 0.190 (0.0075)
Second 0.015 - 0.049 (0.0006 - 0.0019) 0.15 (0.006)
Oil 0.045 - 0.144 (0.0018 - 0.0057) 0.240 (0.0094)
Ring end gap Top 0.20 - 0.30 (0.008 - 0.012) 1.0 (0.04)
Second 0.30 - 0.40 (0.012 - 0.016) 1.0 (0.04)
Oil (side rail) 0.20 - 0.45 (0.008 - 0.018) 1.0 (0.04)
Connecting rod Small end I.D. 13.005 - 13.020 (0.5120 - 0.5126) 13.07 (0.515)
Big end I.D. 28.020 - 28.033 (1.1031 - 1.1036) 28.066 (1.1050)
Big end oil clearance 0.040 - 0.063 (0.0016 - 0.0025) 0.120 (0.0047)
Big end axial clearance 0.10 - 0.50 (0.004 - 0.020) 0.80 (0.031)
Crankshaft Main journal O.D. (PTO side) 27.980 - 27.993 (1.1016 - 1.1021) 27.933 (1.0997)
Main journal O.D. (Flywheel side) 25.380 - 25.393 (0.9992 - 0.9997) 25.333 (0.9974)
Crank pin O.D. 27.970 - 27.980 (1.1012 - 1.1016) 27.920 (1.0992)
Case Cover Main journal I.D. 25.420 - 25.441 (1.0008 - 1.0016) 25.466 (1.0026)
Crankshaft axial clearance 0.15 - 0.65 (0.006 - 0.026) 1.0 (0.04)
Crank Case Main journal I.D. 28.020 - 28.041 (1.1031 - 1.1040) 28.066 (1.1050)
Spark plug Gap 0.70 - 0.80 (0.028 - 0.031) -
Ignition coil Resistance Primary coil 0.4 - 0.6 Ω -
Secondary coil 8.3 - 12.5 kΩ -
Air gap (at flywheel) 0.30 - 0.50 (0.012 - 0.020) -
Flywheel brake
(PKA/VKA/VLA
types only)
Brake shoe thickness 4.5 ~ 6.0 mm (0.18 ~ 0.24 in) 3.0 (0.12)
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