Feuling PSI Tester — Harley-Davidson Road King, Road King Classic, Electra Glide (1999-2006)

Feuling PSI tester for Twin Cam engine builders to bench-test camplate relief valves before installation. Verifies pressure settings, checks valve seat and seal integrity, and allows spring tension adjustment to achieve desired pop-off PSI.

Features

• Tests camplate relief valve operation on the bench
• Includes air regulator and 0–100 psi pressure gauge
• Allows spring tension adjustment for custom pop-off PSI
• Checks valve seat, seal, and detects leakage
• Fits all Twin Cam engine camplates
• Made in the U.S.A.

Specifications

• Brand: Feuling
• Manufacturer Part #: 9010
• Length: 8.6 in
• Width: 8.2 in
• Height: 2.1 in
• Weight: 2.435 lbs
• Country of Origin: United States

Fitment

Fits all Harley-Davidson Twin Cam engine camplates. Also compatible with V-twin motorcycle camplates using the same mounting pattern.

Frequently Asked Questions

What's included in the box?

Air regulator, 0–100 psi pressure gauge, gasket, and all necessary hardware for Twin Cam camplate testing.

Can I adjust the relief valve spring tension with this tool?

Yes — the tester allows you to check and adjust spring tension to achieve your target pop-off PSI.

What PSI range should the relief valve open at?

Feuling recommends the camplate valve seat at 0–30 psi with full pop-off at 55–60 psi for optimal engine protection.

Will this fit my Milwaukee-Eight engine?

No — this tester is designed for Twin Cam engine camplates. Milwaukee-Eight engines use a different camplate design.

Do I need any additional air supply to operate this tester?

Yes — you'll need an air compressor with a regulated air source to operate the included air regulator and gauge.