Overboring/Restroking Sizes
Engine
Capacities (Overbores)
|
Standard
OverBore size |
Stroke
mm |
Standard
Engine capacity CC |
Overbored
Capacity CC |
||
|
|
|
|
+0.020 |
+0.040 |
+0.060 |
|
2.477 |
68.26 |
848 |
862 |
876 |
890 |
|
2.477 |
76.2 |
948 |
962 |
978 |
993 |
|
2.457 |
81.3 |
997 |
1010 |
1027 |
1043 |
|
2.543 |
76.2 |
998 |
1014 |
1030 |
1046 |
|
2.543 |
83.72 |
1098 |
1115 |
1132 |
1150 |
|
2.780 |
61.01 |
970 |
984 |
998 |
1012 |
|
2.780 |
68.26 |
1071 |
1086 |
1102 |
1117 |
|
2.780 |
81.3 |
1275 |
1293 |
1312 |
1330 |
Restroked Big
Bore Engines
|
Stroke
length in mm |
Capacity
CC |
||
|
|
+0.020 |
+0.040 |
+0.060 |
|
58.9 |
999 |
|
|
|
76.5 |
1299 |
|
|
|
75.5 |
|
1299 |
|
|
84 |
1425 |
1445 |
1473 |
|
85 |
1442 |
1463 |
1491 |
|
86 |
1459 |
1480 |
1508 |
|
87 |
1476 |
1497 |
1526 |
|
88 |
1493 |
1514 |
1543 |
|
89 |
1510 |
1531 |
1561 |
|
90 |
1527 |
1549 |
1578 |
|
91 |
1544 |
1556 |
1596 |
Bore & Stroke
Combinations
|
Engine
type |
Stroke
|
Bore
|
CC`s
|
|
1000cc
|
76,2mm
|
64,57 |
998 |
|
|
|
65,08 |
1013 |
|
|
|
65,33 |
1021 |
|
|
|
65,58 |
1029 |
|
|
|
66,1 |
1045 |
|
|
|
68 |
1106 |
|
1100cc
|
83,75mm
|
64,57 |
1098 |
|
|
|
65,08 |
1113 |
|
|
|
65,33 |
1122 |
|
|
|
65,58 |
1131 |
|
|
|
66,1 |
1149 |
|
|
|
68 |
1216 |
|
|
|
68,5 |
1234 |
|
|
|
68,76 |
1243 |
|
|
|
69,01 |
1252 |
|
|
|
69,52 |
1271 |
|
Enginetype
|
Stroke
|
Bore
|
CC`s
|
|
1300cc
|
81,28mm
|
70,61 |
1272 |
|
|
|
71,12 |
1290 |
|
|
|
71,37 |
1300 |
|
|
|
71,62 |
1309 |
|
|
|
72,12 |
1328 |
|
|
|
73,5 |
1379 |
|
|
|
73,65 |
1385 |
|
|
|
74 |
1398 |
|
|
|
74,15 |
1403 |
|
|
|
74,40 |
1412 |
|
Shortstroke
|
76 |
73,5 |
1289 |
|
|
|
74 |
1306 |
|
Enginetype
|
Stroke
|
Bore
|
CC`s
|
|
1300cc
|
81.28mm
|
70,61 |
1272 |
|
Longstroke
|
84 |
70,61 |
1316 |
|
|
|
71,62 |
1353 |
|
|
|
72,12 |
1372 |
|
|
|
73,5 |
1425 |
|
|
|
74 |
1444 |
|
|
|
74,7 |
1472 |
|
Longstroke |
86mm |
73,5 |
1459 |
|
|
|
74 |
1479 |
|
|
|
74,7 |
1506 |
|
Longstroke |
91mm |
73,5 |
1544 |
|
|
|
74 |
1565 |
|
|
|
74,4 |
1582 |
|
|
|
74,7 |
1594 |