MOTION PRO SKU: 57-8339

Motion Pro Tappet Tool - Harley-Davidson Big Twin

$10.99
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About Motion Pro

Motion Pro builds control cables, specialty tools and service equipment for motorcycles, and is the name most shops reach for when a job needs the correct tool rather than an improvised one. Its cables are built to OE routing specifications.

The Motion Pro Tappet Tool is specifically engineered for precise valve adjustments on Harley-Davidson Big Twin engines. This tool simplifies a critical maintenance task, allowing you to fine-tune your valvetrain without unnecessary hassle. Its intelligent design ensures a secure fit and allows for full wrench rotation, even in confined spaces.

Why riders pick this

  • Works with standard 7/16" combination wrench
  • O-ring design for secure grip on wrench or socket
  • Allows full wrench rotation without engine contact
  • Often used without removing exhaust pipes
  • Essential for precise valve adjustments

Maintaining proper valve clearance is crucial for your V-twin's performance and longevity. The Motion Pro Tappet Tool makes this essential task more manageable on Big Twin engines with slotted screw tappet covers. Designed to be used with a standard 7/16" wrench, it provides the leverage and access needed for accurate adjustments, helping your engine run at its best.

Engineered for Precision and Access

  • Works seamlessly with a standard 7/16" combination wrench
  • O-ring design securely grips the wrench or socket
  • Flange allows for effective downward force application
  • Can often be used without removing exhaust pipes

Simplify Your Valvetrain Maintenance

Unlike makeshift solutions, this Motion Pro Tappet Tool is purpose-built for the job. Its compact design often allows you to perform valve adjustments without the need to remove your exhaust pipes, saving significant time and effort. This tool is a valuable addition to any V-twin owner's toolkit, ensuring your Harley-Davidson Big Twin maintains optimal valve timing and performance.

Specifications

  • Brand: Motion Pro
  • Manufacturer Part #: 08-0339
  • Length: 3.25 in
  • Width: 5.2 in
  • Height: 0.65 in
  • Weight: 0.045 lbs
  • Country of Origin: China (Mainland)

Common questions

Will this tappet tool work on my Twin Cam engine?

No, this Motion Pro Tappet Tool is specifically designed for Harley-Davidson Big Twin engines with slotted screw tappet covers and is not compatible with Twin Cam models.

Do I need to remove my exhaust pipes to use this tool?

On most V-twin motorcycles, this tappet tool is designed to be used without the need to remove your exhaust pipes, which can save considerable time during maintenance.

What size wrench is required to use this tappet tool?

This tool is designed to be used in conjunction with a standard 7/16" combination wrench for adjusting your V-twin's tappets.

Ordering from Vtwinbikers

  • Brand new, sourced through authorized US distribution — never used, never grey-market.
  • Not sure it fits? Use Shop by Bike to filter by your year and model, or email us and we will confirm before you order.
  • Harley-Davidson and Indian Motorcycle is all we do, so you are talking to people who ride what you ride.
BRANDMotion Pro
TYPETools
SKU57-8339
WEIGHT0.04 lb
Please contact us to confirm fitment for your specific motorcycle, or check the product title for compatibility notes.
CUSTOMER REVIEWS
5
2 RATINGS
5★ 2
4★ 0
3★ 0
2★ 0
1★ 0
✓ VERIFIED
May 1, 2025

Best funnel

Best funnel to use. You can pre measure the oil, put on the lid and slowly release the liquids into the bike. It also has a handle so you can attach it to your frame while using.

— DANIEL F
✓ VERIFIED
Jan 29, 2025

A BMW Boxer Owner Cheat Code

An absolute must have if you own an air cooled BMW boxer! The adjustable funnel and valve makes doing final drive and transmission oil changes a breeze!

— Scott B