Mofun Double-Headed Cam Locking Tool for Harley Twin Cam & M8 Motors — Dual-Profile, Durable Steel

Mofun's double-headed cam locking tool securely holds camshaft and crankshaft sprockets for Harley Twin Cam (1999–2017), M8 motors (2017–2026) and compatible Dyna models, letting you remove, install and torque sprocket bolts safely and accurately.

If you work on Harley engines at home or in a shop, the right locking tool saves time and prevents costly timing errors. This tool combines two common factory-style locking profiles in a single piece—covering older Twin Cam bikes and newer M8 powerplants—so you can service multiple machines without switching tools. Built from durable materials for repeated use, it’s aimed at mechanics and DIYers who need a dependable, easy-to-use solution for camshaft and crankshaft sprocket maintenance.

Which Harley engines and models does this tool work with?

The Mofun double-headed cam locking tool fits a broad range of Harley-Davidson V-twins. It covers Twin Cam engines produced from 1999 through 2017, is compatible with M8 engines produced from 2017 through 2026, and also fits many Dyna frame models from 1999 to 2006. The two heads correspond to different factory sprocket interfaces so one tool handles both eras.

• Twin Cam 1999–2017 compatibility (older style cam profiles)
• M8 motors 2017–2026 fitment (newer cam profile head included)
• Dyna models 1999–2006 supported
• Dual-head design includes both common factory locking shapes (part references 42314 and 47941)

How does the dual-head design make engine work easier?

Having both locking faces on the same tool eliminates the need to own separate tools for different engine generations. You can quickly flip or rotate the tool to use the head that matches the bike you’re working on, speeding up service tasks and reducing clutter in the toolbox. The integrated design also reduces the chance of losing small adapters or extra pieces.

• Two heads accept the most common factory sprocket positions
• One-piece tool prevents misplacing adapters
• Speeds transitions between older and newer engines during multi-bike servicing
• Fits both camshaft and crankshaft sprocket locking points for secure torque operations

What materials and durability can I expect?

This locking tool is manufactured to withstand workshop use with materials selected for strength and wear resistance. It resists deformation under torque so sprocket bolts can be removed or tightened without the locking tool failing. The durable construction makes it suitable for regular maintenance, rebuilds, and professional shop use.

• Robust metal construction for repeated torque applications
• Precision-machined faces for secure engagement with sprockets
• Built to endure shop environments and routine engine servicing
• Single-piece build reduces failure points compared to multi-part kits

How do I install and use the Mofun cam locking tool safely?

Installation is straightforward: position the correct head against the cam/crank sprocket so the tool engages the timing slots, then hold the sprocket steady while loosening or tightening the bolt to the manufacturer’s torque spec. Always follow Harley-Davidson service procedures for timing cover removal, bolt sequence and torque values. Use appropriate hand tools and wear eye protection when working around rotating parts and springs.

• Select the matching head for your engine (Twin Cam or M8)
• Line up tool with sprocket timing slots and ensure full engagement
• Hold tool steady while removing or torquing sprocket bolts to spec
• Follow OEM service instructions and safe workshop practices

Who this tool is for: The Mofun double-headed cam locking tool is intended for motorcycle mechanics, restoration hobbyists, and home DIYers who service Harley V-twin engines across model years. It’s especially useful for shops or owners who work on both older Twin Cam and newer M8 bikes and want a single durable tool to cover common sprocket locking needs. The tool ships as a single unit (1 x double-headed cam locking tool) and is best paired with standard hand tools and an OEM service manual for safe maintenance.