Wiseco Tracker Piston Kit - 96 TO 103 4.375" Stroke 10.5:1 +.020 — Harley-Davidson (1999-2017)

Wiseco Tracker piston kit for 96–103 cubic inch V-twin engines with 4.375" stroke and 10.5:1 compression ratio, forged with generous valve pockets and ArmorGlide skirt coating. Includes precision rings, force-fed pin oiling, and all necessary hardware for a complete top-end rebuild.

Features

• Forged piston crown with big-valve pockets
• Precision-fit rings for ultimate sealing
• Force-fed pin oiling for enhanced lubrication
• ArmorGlide skirt coating reduces friction and scuff risk
• Manufactured in the USA

Specifications

• Brand: Wiseco
• Manufacturer Part #: K0210P2
• Engine Displacement: 96–103 cubic inch
• Stroke: 4.375 inch
• Compression Ratio: 10.5:1
• Oversizing: +.020 inch
• Length: 9.5 in
• Width: 4.87 in
• Height: 4 in
• Weight: 2.75 lbs
• Country of Origin: United States of America

Fitment

Fits 96–103 cubic inch V-twin motorcycle engines with 4.375" stroke configuration. Confirm your engine displacement and stroke measurement before ordering.

Frequently Asked Questions

Does this kit include gaskets and seals?

The piston kit includes the piston, rings, and pin hardware. Gasket kits are sold separately and must be ordered based on your engine type.

What is the +.020 oversizing?

The +.020 means the piston diameter is 0.020 inch larger than stock. Your cylinder must be bored and honed to +.020 spec for proper fit.

Is the piston pin oiling improved over stock?

Yes — force-fed pin oiling delivers better lubrication to the piston pin than stock designs, reducing wear at high rpm.

Can I use this on a stock-displacement engine or only on bored bikes?

This piston is sized at +.020 oversizing, so your engine must be bored. Stock piston kits are available separately.

Is installation straightforward for a qualified mechanic?

Yes, if you have experience with top-end rebuilds. Proper ring gap setting, piston pin installation, and correct bore honing are essential for reliability.