52
TABLE OF SPECIFICATIONS
Reference Column 1 2 3 4 5
U.S. Metric U.S. Metric U.S. Metric U.S. Metric U.S. Metric
mm mm mm mm mm
Bore 2.093 53.162 2.093 53.162 2.093 53.162 2.093 53.162 2.093 53.162
2.094 53.188 2.094 53.188 2.094 53.188 2.094 53.188 2.094 53.188
Stroke 1.250 31.75 1.410 35.814 1.410 35.814 1.410 35.814 1.410 35.814
Cu. In. Displacement 4.40 72.1 4.80 78.7 4.80 78.7 4.80 78.7 4.80 78.7
(in
3
) (cc)
Point Gap .017 .432 .017 .432 .017 .432 .017 .432 .017 .432
Timing .122 3.098 .100 2.54 .135 3.429 .100 2.54 .135 3.429
B.T.D.C.
Spark Plug Gap .030 .762 .030 .762 .030 .762 .030 .762 .030 .762
Piston Ring .007 .178 .007 .178 .006 .15 .006 .15 .006 .15
End Gap .017 .432 .017 .432 .011 .28 .014 .35 .011 .28
Piston 2.0870 53.01 2.0870 53.01 2.0875 53.023 2.0875 53.023 2.0875 53.023
Diameter 2.0880 53.035 2.0880 53.035 2.0885 53.048 2.0885 53.048 2.0885 53.048
(Top) .0655 1.664 .0655 1.664 .0655 1.664 .0975 1.664 .0655 1.664
.0665 1.689 .0665 1.689 .0665 1.689 .0985 1.689 .0665 1.689
.0645 1.638 .0645 1.638 .0645 1.638 .0955 1.638 .0645 1.638
(Bot.) .0655 1.664 .0655 1.664 .0655 1.664 .0965 1.664 .0655 1.664
Piston Ring .0615 1.562 .0615 1.562 .0615 1.562 .0925 2.35 .0615 1.562
Width .0625 1.587 .0625 1.587 .0625 1.587 .0935 2.375 .0625 1.587
Piston Pin .4997 12.692 .4997 12.692 .4997 12.692 .3750 9.525 .4997 12.693
Diameter .4999 12.697 .4999 12.697 .4999 12.697 .3751 9.528 .4999 12.697
Crank Pin Journal .5611 14.252 .5614 14.260 .5614 14.260 .6857 17.417 .5611 14.252
Diameter .5618 14.270 .5621 14.277 .5621 14.277 .6865 17.437 .5618 14.270
Crankshaft .6691 16.995 .6691 16.995 .6691 16.995 .6691 16.995 .6691 16.995
P.T.O. Side .6695 17.005 .6695 17.005 .6695 17.005 .6695 17.005 .6695 17.005
Main Brg. Dia.
Crankshaft .6691 16.995 .6691 16.995 .6691 16.995 .6691 16.995 .6691 16.995
Magneto Side .6695 17.005 .6695 17.005 .6695 17.005 .6695 17.005 .6695 17.005
Main Brg. Dia.
Crankshaft None None None None None None None None None None
End Play
Piston Ring
Groove Width
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