3/4" ID x 1-5/8" OD x 7/16" M2 Sealed Jackshaft Bearing, Junior Sprint Tools choose Engine Ice when you

choose Engine Ice when you make your next coolant change

Bolt hole spacing for mounting to the spindle is 2-1/8"

Aerosol spray penetrates the chain under pressure

Hyper Racing # 366-304

3/4" ID x 1-5/8" OD x 7/16" M2 Sealed Jackshaft Bearing, Junior Sprint Tools choose Engine Ice when youHyper Racing # 651 051 Fits Hyper & D1 Jack Shaft Assembly. When it comes to your bearings, reducing friction and rolling resistance translates to increased speed! The M2 process introduces a treatment to metal surfaces to reduce friction and drag, enhance oiling capabilities, and prolong life. M2 bearings begin as the highest quality Superior bearings. After adding the M2 treatment, all sealed bearings are repacked with DAYLube High Performance