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:-

* Note: Do not reuse the old retaining ring that secures this bearing.

* This bearing requires a new retaining ring # HD11177A.

* Never use # 11177 retaining ring to secure this bearing, Reusing an old retaining ring or a # 11177 retaining ring could cause damage to bearing and pinion shaft.

* Replaces OEM # 24643-87A

MFR PART No: 31-4018

ROLLIES PART No: SS31-4018