1st Gear Set. Fits 4Spd Big Twin 1959-1986. 2.44 Ratio.

* 17T x 20T mainshaft 1st gear cluster with a 24T countershaft 1st gear.

* Installation in 1980-86 4sp Big Twin requires purchase of a 21 tooth countershaft 2nd gear AP-202160.

* Best choice for Superglides, choppers and lighter bikes. This i