1 Harley Davidson Pinion Gear & Oil Pump Drive Gear Woodruff Key 54-89 BT BC21415

1 Woodruff Key 

Pinion shaft / oil pump shaft. 
OEM replacement reference 23985-54. 

Fits 
54-E75; 87-89 Big Twin: Pinion gear on pinion shaft.
54-86 Big Twin: Drive gear oil pump on pinion shaft.
54-E75 Big Twin: Driven gear oil pump on oil pump shaft

This listing is for 1 woodruff key