Harddrive Cush Drive Chain Conversion Kit - 51t Sprocket Silver FOR Conv KIT — Harley-Davidson (1955-2026)

Harddrive cush drive chain conversion kit with 51-tooth rear sprocket for V-twin cruisers and touring bikes. Complete kit includes hub adapter plate, spacer, bearing, and both rear and transmission sprockets, geared lower than stock to increase usable torque in the mid-range RPM band.

Features

• CNC-machined billet aluminum hub adapter plate
• Heat-treated steel sprockets for durability
• 51T rear sprocket and 24T transmission sprocket included
• Lower gear ratio for increased mid-range power
• Spacer and bearing assembly included

Specifications

• Brand: Harddrive
• Manufacturer Part #: 201400
• UPC: 191361374401
• Rear Sprocket Teeth: 51
• Transmission Sprocket Teeth: 24
• Weight: 4.4 lbs
• Length: 10.6 in
• Width: 10.5 in
• Height: 0.75 in
• Country of Origin: China (Taiwan)

Fitment

Fits V-twin cruisers and touring motorcycles with cush drive rear hubs. Verify your bike's hub type before ordering.

Frequently Asked Questions

What chain do I need for this conversion kit?

A 530x130-link chain is recommended. You'll need to size and cut the chain to fit your specific model — chain sold separately.

What's included in the kit?

Hub adapter plate, spacer, bearing assembly, 51-tooth rear sprocket, and 24-tooth transmission sprocket.

How much lower is the gear ratio compared to stock?

The kit is geared lower than your bike's 6-speed transmission to deliver more usable power in the mid-range RPM band.

Do I need any special tools to install this?

Installation requires basic motorcycle maintenance skills and tools. The kit includes all necessary hardware; however, chain sizing and installation may require shop assistance if you're unfamiliar with the process.

Will this work on my specific V-twin model?

This kit fits V-twin cush drive hubs. Verify your bike uses a cush drive hub and check fitment specs before ordering, as different models may have varying hub designs.