ReluxGo Mainshaft Sprocket 1 7/8" Socket with 1/2" Drive

ReluxGo's 1 7/8" mainshaft sprocket socket is a heavy-duty, 1/2" drive tool engineered to remove and install the transmission pulley locknut on 1936–2006 Harley-Davidson Big Twins and 1999–2006 Twin Cam engines (except 2006 Dyna).

If you work on classic or modern Harley Big Twin engines, the right specialty socket saves time and prevents damage to pulleys and locknuts. This ReluxGo tool combines an exact-fit 1 7/8" socket profile with a 1/2" drive interface, a 5.5" depth for reach, and a threaded bushing to guide fasteners. Built from heat-treated AISI 1045 carbon steel, it balances strength and wear resistance so you can change belts, pulleys or sprockets without improvising or risking rounded edges.

How does the ReluxGo socket fit Harley transmission pulleys?

The socket is machined to match the 1 7/8" nut used on Harley front transmission pulleys, ensuring secure contact and even torque distribution. Its 5.5" depth reaches recessed locknuts while the internal profile prevents slippage that can mar the nut.

• Exact 1 7/8" internal diameter for compatible Big Twin and Twin Cam locknuts
• 5.5" length to access deep-set transmission pulleys
• Threaded bushing included to centralize and stabilize locknuts during removal and installation

Will this tool work with my model years and exceptions?

ReluxGo designed the socket for broad coverage of Harley front transmission pulley locknuts across many model years. It fits 1936–2006 Big Twins and 1999–2006 Twin Cam transmissions, but it is not compatible with the 2006 Dyna front pulley application.

• Covers wide Harley Big Twin span (1936–2006)
• Fits Twin Cam transmissions from 1999–2006
• Not suitable for 2006 Dyna front pulley configurations

What makes the construction reliable for repeated garage use?

The socket is fabricated from AISI 1045 medium carbon steel and heat-treated to increase hardness and fatigue resistance. That material choice and the corrosion-resistant finish make it robust for professional shops and hobbyists who regularly remove and reinstall transmission pulleys.

• AISI 1045 medium carbon steel for improved tensile strength
• Heat treatment for wear resistance and long service life
• Corrosion-resistant surface to reduce rust in workshop environments

How do I use the ReluxGo mainshaft sprocket socket safely and effectively?

Attach a 1/2" ratchet or breaker bar to the socket's integrated 1/2" drive, position the threaded bushing if needed, and keep steady force while loosening or tightening the locknut. Using the correct torque spec for your model prevents over-tightening and protects both the socket and the pulley assembly.

• Use a 1/2" drive ratchet or breaker bar (not included)
• Fit the threaded bushing to center the socket on oversized or worn locknuts
• Apply manufacturer torque specs to avoid hardware damage

Who this tool is for: mechanics, restorers and DIY Harley owners who service Big Twin and Twin Cam transmissions will find this socket a practical, durable addition to their specialty tool kit. If you need precise engagement with 1 7/8" pulley locknuts — especially when working on older or deeply recessed transmissions — the ReluxGo socket keeps jobs clean and efficient without damaging fasteners. For any questions after purchase, ReluxGo offers customer support to help confirm fitment or walk through basic usage tips.