Motion Pro Sprocket Jammer

Motion Pro sprocket jammer for V-twin motorcycles prevents chain and sprocket rotation during counter shaft nut removal or rear axle service. CNC-machined from billet aluminum with blue anodize finish for durability and visibility in the toolbox.

Features

• Prevents chain and sprocket rotation during maintenance
• Can pull rear wheel against chain blocks for axle tightening
• CNC billet aluminum construction
• Blue anodize with laser etching for easy identification

Specifications

• Brand: Motion Pro
• Manufacturer Part #: 08-0642
• Length: 5.98 in
• Width: 3.97 in
• Height: 0.43 in
• Weight: 0.07 lbs
• Country of Origin: China (Mainland)

Fitment

Fits V-twin motorcycles including Harley-Davidson and Indian Motorcycle models.

Frequently Asked Questions

What is a sprocket jammer used for?

It locks the chain and sprockets in place so you can safely remove or install the counter shaft nut without the engine rotating during service.

Can I use this to hold the rear wheel when tightening the axle?

Yes — position the jammer to pull the rear wheel against chain blocks for leverage when torquing the rear axle nut.

Will this fit any V-twin motorcycle?

Yes — this universal jammer works on any V-twin Harley-Davidson or Indian Motorcycle with a standard chain drive.

Is this tool street-legal to carry on the bike?

This is a service tool for shop or home use, not for roadside carry. Remove it before riding.