Wiseco Tracker Piston Kit - 96 TO 103 4.375" Stroke 10.5:1 STD — Harley-Davidson Softail Heritage Classic, Road King, Softail Fat Boy (1999-2026)

Wiseco Tracker piston kit for V-twin engines with 4.375" stroke, 96–103 cubic inch displacement, and 10.5:1 compression ratio. Forged construction with ArmorGlide skirt coating reduces friction and scuff risk, while force-fed pin oiling keeps the piston pin lubricated under load.

Features

• Forged piston crown with large valve pockets
• Precision-fit rings for superior sealing
• Force-fed pin oiling for enhanced lubrication
• ArmorGlide skirt coating reduces friction and scuffing
• Made in the United States

Specifications

• Brand: Wiseco
• Manufacturer Part #: K0210PS
• Displacement: 96–103 cu in
• Stroke: 4.375 in
• Compression Ratio: 10.5:1
• Length: 9.5 in
• Width: 4.87 in
• Height: 4 in
• Weight: 2.75 lbs
• Country of Origin: United States of America

Fitment

Fits V-twin motorcycles with 4.375" stroke in the 96–103 cubic inch range, including Harley-Davidson and Indian Motorcycle models.

Frequently Asked Questions

What compression ratio is this kit?

10.5:1 — a moderate boost for bolt-on heads and higher-octane fuel without requiring extensive machine work.

Are gasket kits included?

No — gasket kits are sold separately. Order the matching gasket set for your engine when you order this piston kit.

Will this fit my 96" Harley?

This kit is rated for 96–103 cu in engines with a 4.375" stroke. Verify your engine displacement and stroke before ordering.

What's the advantage of ArmorGlide coating?

ArmorGlide reduces piston-to-cylinder wall friction, lowers operating temperature, and improves scuff resistance during break-in and under load.

Is installation a DIY job?

Piston installation requires engine removal and machine work — including honing the cylinders, measuring clearances, and proper ring-end-gap checking. Use a qualified machine shop or experienced engine builder.