S&S® 3-13/16" Stroke Flywheel Assembly For 1937-'73 HD® W, K (Except KH), and G Model 45" flathead engines. These flywheels are compatible with stock mainshafts, but are machined for a special S&S tapered crankpin, which can be used with stock KR rods, or rods for 1957-'84 HD Sportster® models. Special crankpin is not included with flywheels.
A special S&S tapered crankpin is required for use with these flywheels. Order Part# 34-2513.
S&S offers a special connecting rod set which includes the special tapered crankpin and a set of S&S connecting rods for 1957-'85 HD® Sportster® models. Order Part# 34-7505