Jims Tools 96781-72 Wrist Pin Spiral Lock Ring Installation Tool

The Jims Tools 96781-72 Wrist Pin Lock Ring Tool is a precision-engineered specialty tool designed to install spiral-lock wrist pin retaining rings quickly, cleanly, and without distortion. Designed for use on Big Twin and Sportster engines, this tool ensures proper seating of the spiral-lock ring in a single step — eliminating the risk of ring damage that commonly occurs when attempting installation without the correct tooling.

Key Features:

• Installs spiral-lock wrist pin retaining rings in one easy step
• Designed for pistons with a .535" (13.58 mm) I.D. wrist pin bore
• Prevents ring distortion during installation for the safest wrist pin retention possible
• Replaces OEM Harley-Davidson part number HD 96781-72
• Made in the USA

Kit Contents (2 Pieces):

• (1) Collar/Sleeve
• (1) Instruction Sheet

Installation Notes: Press the spiral-lock ring into the bore of the sleeve using the large end of the tool handle, then place the sleeve into the wrist pin hole of the piston to seat the ring firmly in its groove. Always wear safety glasses during installation. Never reuse spiral-lock rings — always install new rings and verify proper end play after installation.

Attempting to install spiral-lock wrist pin rings without this tool will most likely result in damaged lock rings or an improperly seated retaining ring, which can lead to engine failure. The JIMS 96781-72 is the professional-grade solution for correct, repeatable spiral-lock ring installation.