Harley V-Twin Displacement Calculator

Enter two unknowns in the form below and press the "CALCULATE" button.
This calculator will give you the third value

(Note: You can enter values in cm if you wish results in cm)

Bore in Inches

Stroke in Inches

Cubic Inches Displacement

Model Bore Stroke CID CC's
Iron Sportster 1957-1971 3.000 3.8125 53.9 883
Iron Sportster 1972-1985 3.1875 3.8125 60.8 996
Evo Sportster 3.000 3.8125 53.9 883
Evolution Big Twin 3.498 4.250 81.68 1338
V-Rod 3.940 2.830 69 1131
Twin Cam 88 3.750 4.000 88.4 1448
Twin Cam 96 3.750 4.375 96.6 1582
M8 107
3.937
4.375
106.5
1745
M8 114
4.000
4.500
113.09
1853
M8 117
4.075
4.500
117.37
1923