Size
Bore 92 95 96 97 98 99 100 101 102 105 106 108 110 112 120
Stroke
4000fpm
5000fpm
                             
69.2
8809
11,012
920cc
56.1ci
980cc
59.8ci
1001cc
61.6ci
1023cc
62.4ci
1044cc
63.7ci
1065cc
65ci
1087cc
66.3ci
1109cc
67.7ci
1131cc
69ci
1198cc
73.1ci
1221cc
74.5ci
1268cc
77.4ci
1315cc
80.2ci
1364cc
83.2ci
1565cc
95.5ci
75
8128
10,160
997cc
60.8ci
1063cc
64.9ci
1086cc
66.3ci
1108cc
67.6ci
1131cc
69ci
1155cc
70.5ci
1178cc
71.9ci
1202cc
73.4ci
1226cc
74.8ci
1299cc
79.3ci
1324cc
80.7ci
1374cc
83.4ci
1425cc
87ci
1478cc
90.2ci
1696cc
103.5ci
84
7257
9071
1117cc
68.2ci
1191cc
72.7ci
1216cc
74.2ci
1241cc
75,8ci
1267cc
77.3ci
1293cc
78.9ci
1319cc
80.5ci
1346cc
82.1ci
1373cc
83.8ci
1455cc
88.8ci
1483cc
90.5ci
1539cc
93.9ci
1597cc
97.5ci
1655cc
101ci
1900cc
115.9ci
87
7007
8759
1157cc
70.6ci
1233cc
75.2ci
1259cc
76.8ci
1286cc
78.5ci
1312cc
80.1ci
1339cc
81.7ci
1367cc
83.4ci
1394cc
85.1ci
1422cc
86.8ci
1507cc
92ci
1536cc
93.8ci
1594cc
97.3ci
1653cc
100.9ci
1714cc
104.6ci
1968cc
120.1ci
89
6849
8562
1183cc
72.2ci
1262cc
77ci
1288cc
78.6ci
1315cc
80.3ci
1343cc
81.9ci
1370cc
83.6ci
1398cc
85.3ci
1426cc
87ci
1454cc
88.7ci
1541cc
94ci
1571cc
95.9ci
1631cc
99.5ci
1692cc
103.3ci
1754cc
107ci
2013cc
122.8ci
102
5976
7471
1356cc
82.7ci
1446cc
88.2ci
1477cc
90.1ci
1508cc
92ci
1539cc
93.9ci
1570cc
95.8ci
1602cc
97.8ci
1634cc
99.7ci
1667cc
101.7ci
1766cc
107.8ci
1800cc
109.9ci
1869cc
114.1ci
1939cc
118.3ci
2010cc
122.7ci
2307cc
140.1ci

Redline is reckoned at a piston speed of 4000 feet per minute.   High-chrome valve springs, lighter valves, and other modifications can raise this to 5000fpm, no problem. Modern European twins exceed 5500 FPM.

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