Specifications

68
Model HH80 HH100 HH120
U.S. Metric U.S. Metric U.S. Metric
Piston Pin Diameter .6873 17.457 .6873 17.457 .6873 17.457
.6875 17.463 .6875 17.463 .6875 17.463
Width Comp. Ring Groove .0950 2.413 .0950 2.413 .0950 2.413
.0960 2.438 .0960 2.438 .0960 2.438
Width Oil Ring Groove .1880 4.775 .1880 4.775 .1880 4.775
.1900 4.826 .1900 4.826 .1890 4.826
Side Clearance Ring Groove .0020 .051 .0020 .051 .0020 .051
.0035 .889 .0035 .889 .0035 .889
Ring End Gap .007 .178 .007 .178 .007 .178
.020 .508 .020 .508 .020 .508
Top Piston Land Clearance .0305 .775 .030 .762 .031 .787
.0335 .851 .035 .889 .036 .914
Piston Skirt Clearance .002 .051 .002 .051 .003 .076
.005 .127 .005 .127 .006 .127
Camshaft Bearing Diameter .6235 15.837 .6235 15.837 .6235 15.837
.6240 15.850 .6240 15.850 .6240 15.850
Cam Lobe Diameter Nose to Heel 1.3045 33.134 1.3045 33.134 1.3045 33.134
1.3085 33.326 1.3085 33.236 1.3085 33.236
Magneto Air Gap .006 .152 .006 .152 .006 .152
.010 .254 .010 .254 .010 .254
Model VH80 VH100
U.S. Metric U.S. Metric
Displacement 23.7 388.4 cc 23.7 388.4 cc
Stroke 2-3/4'’ 69.85 2-3/4'’ 69.85
Bore 3.3120 84.125 3.3120 84.125
3.3130 84.150 3.3130 84.150
Timing Dimension Solid State Solid State
Point Gap Solid State Solid State
Spark Plug Gap .035 .889 .035 .889
Valve Clearance Intake .010 .254 .010 .254
Exhaust .020 .508 .020 .508
Valve Seat Angle 46° 46° 46° 46°
Valve Seat Width .042 1.067 .042 1.067
.052 1.321 .052 1.321