Motion Pro Engine Primary Gear Sprocket Jammer – Gear Locking Tool – Made in USA

OVERVIEW

The Motion Pro Engine Primary Gear Sprocket Jammer is a specialty tool designed to secure engine primary gears during installation and removal. By preventing unwanted rotation, this device enables mechanics to safely apply precise torque to lock nuts without damaging components or relying on improvised holding methods. Primarily engineered for motorcycle maintenance, it delivers focused performance on virtually any platform.

ENGINEERING & PERFORMANCE

A high-torque internal magnet anchors the jammer firmly against the sprocket face, eliminating slippage while you apply rotational force. The rigid body interfaces directly with primary gear teeth to hold them stationary, ensuring consistent lever transfer and accurate fastener seating. Originally validated on the Honda CRF450R/X, the universal geometry has been refined for broad compatibility across multiple motorcycle engines. Built for repeated shop cycles, the compact form withstands sustained manual torque without deformation.

KEY FEATURES

• Locks engine gears securely for faster installation and removal
• Enables direct torque application on primary lock nuts
• Features a built-in powerful magnet for stable positioning
• Universal design accommodates virtually any motorcycle engine
• Initially developed for Honda CRF450R/X primary gear service
• Requires manual torque input; not for use with impact guns
• Constructed for durable, repeated shop deployment
• Made in the USA

TECHNICAL SPECIFICATIONS

• Brand: Motion Pro
• Part Name: Engine Primary Gear Sprocket Jammer
• Tool Type: Specialty Tool
• Primary Application: Gear Holding & Lock Nut Torquing
• Manufacturing Origin: USA

FITMENT

• Universal — fits most ATV/UTV/motorcycle applications as specified.

WHY RIDERS CHOOSE THIS

Riders and shop technicians prefer this jammer because it removes the instability and risk inherent in spinning engine components during critical maintenance. The anchored magnetic placement combined with its solid mechanical interface provides consistent leverage, allowing straight torque application that protects threads and outperforms common improvised setups. Designed specifically to handle everyday rebuild demands, the straightforward mechanism reduces downtime and prevents costly gear damage, making it a highly reliable asset for routine motorcycle primary drive servicing.