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 3.625 4.625 95.4 1564