"Diamond" PRIMARY CHAIN for 1936 - 1984 Harley Big Twins

H-D #2001-36D, 2001-36AD (40008-36, 40010-36, 40008-36A, 40010-36A)
Diamond* PRIMARY CHAIN (by Timken)
#428 Double Roll (.500" pitch) - Straight Side Plates
used on Motor Sprocket to Clutch Drum
for 1936 - 1984 Knuckle, UL, Pan & Shovel
Available in following lengths:
76 pitch - FXR/FLT 1979 - 1984
80 pitch - generally allows for good adjustment with 19 - 22 tooth Motor Sprocket
82 pitch** - allows for good adjustment with 22 - 23 tooth Motor Sprocket
84 pitch - generally allows for good adjustment with 24 - 25 tooth Motor Sprocket

*Diamond USA has been Harley's OEM brand for over 100 years

** Special Purchase