Crankshaft Right Main Bearing – Blue. Fits Evo Big Twin 1987-1999.

Features & Benefits:-

* Blue Size Pinion Bearing.

* Also upgrades Big Twin 1958-1986 to heavy duty late style bearing.

Tech Tips:-

* This bearing must use OEM retaining ring # 11177A.

* Never use the 1958-1986 spiral retaining ring or the earlier OEM # 11177 C-Style retaining ring to secure the updated 1-piece Pinion bearing.

* Replaces OEM # 24643-87A