APM Clutch Upgrade Kit - `1998-2017 BT — Harley-Davidson Road King, Electra Glide Ultra Classic, Softail Heritage Classic (1998-2017)

APM clutch upgrade kit for 1998-2017 Harley-Davidson Big Twin models, featuring a 15% stiffer diaphragm spring and additional friction plate for increased holding power. Pre-measured stack height and made in the U.S.A.

Features

• 15% stiffer diaphragm spring replaces stock
• Extra clutch plate for increased grab
• 9 friction plates, 8 tempered steel drive plates
• Pre-measured stack height
• Made in the U.S.A.

Specifications

• Brand: APM
• Manufacturer Part #: 1048-0028
• Length: 7.5 in
• Width: 6.75 in
• Height: 2.5 in
• Weight: 2.3 lbs

Fitment

Fits Harley-Davidson Big Twin (BT) models 1998 through 2017.

Frequently Asked Questions

Will this fit my Sportster?

No — this kit is designed for Big Twin models only. Sportster clutches use a different assembly.

Does the stiffer spring make the clutch harder to pull?

The 15% stiffer spring provides more holding power but may require slightly more hand effort. Most riders adapt quickly.

Is installation difficult?

Clutch replacement requires removing the primary cover and is best done by someone with mechanical experience or a shop. Allow 2-3 hours for install.

What's the benefit of the extra plate?

The additional friction plate increases clutch grab and heat capacity, improving holding power under load and reducing slip on stock or lightly modified engines.

Do I need special tools?

You'll need standard motorcycle tools plus a clutch spring compressor tool to safely remove and reinstall the diaphragm spring.