Motion Pro Compression Tester - 10mm 12mm 14mm

Motion Pro compression tester for V-twin motorcycles, featuring a redesigned billet gauge manifold with integrated pressure release valve and 0-300 psi analog gauge. Three spark plug adapters (10mm, 12mm, 14mm) cover most Harley and Indian models, and the integrated quick disconnect fitting makes hose swaps fast and repeatable.

Features

• Billet gauge manifold with integrated pressure release valve
• 0-300 psi precision analog gauge with protective rubber boot
• Three adapters: 10mm, 12mm, and 14mm spark plugs
• Integrated quick disconnect fitting
• Nylon storage pouch included
• All hoses and adapters included

Specifications

• Brand: Motion Pro
• Manufacturer Part #: 08-0651
• Length: 13.3 in
• Width: 6.69 in
• Height: 1.96 in
• Weight: 1.18 lbs
• Country of Origin: China (Mainland)

Fitment

Fits V-twin motorcycles, including most Harley-Davidson and Indian Motorcycle models with 10mm, 12mm, or 14mm spark plug holes.

Frequently Asked Questions

What spark plug sizes does this work with?

Three adapters are included: 10mm, 12mm, and 14mm — covering most Harley and Indian models.

Do I need to buy adapters separately?

No — all three adapters, hoses, and fittings are included in the box.

What's the maximum psi reading?

The analog gauge reads from 0 to 300 psi, suitable for testing V-twin compression.

Is the pressure release valve manual or automatic?

It's integrated into the manifold for safety — use it to bleed pressure between tests without disconnecting the hose.