Wiseco Black Edition Piston Kit - M8 BIG Bore Pistons 124" 11:1 Comp — Harley-Davidson (2017-2026)

Wiseco Black Edition piston kit for Harley-Davidson Milwaukee-Eight big bore applications, featuring forged construction with premium compression rings and dual-coated skirts for reduced friction and extended engine life. Fits 124-inch displacement with 11:1 compression ratio and works with both OEM and Screamin' Eagle cylinder heads.

Features

• Premium compression ring for ultimate ring seal
• Napier second ring with taper face and underhook for oil control
• 3mm oil ring design with higher tension
• Armor X piston coating reduces wear
• ArmorGlide skirt coating for friction reduction and scuff resistance
• Compatible with OEM and Screamin' Eagle heads

Specifications

• Brand: Wiseco
• Manufacturer Part #: K2787
• Displacement: 124 cubic inches
• Compression Ratio: 11:1
• Weight: 3 lbs

Fitment

Fits V-twin motorcycles with Milwaukee-Eight engine configuration in 124-inch big bore applications.

Frequently Asked Questions

Will this work with my Screamin' Eagle or OEM cylinder heads?

Yes — these pistons are engineered to work with both OEM Harley heads and Screamin' Eagle performance heads.

What compression ratio are these rated for?

11:1 compression ratio. Verify your head choice supports this CR before assembly.

Do I need new rings or gaskets when installing?

Yes — use fresh top-end gasket sets and piston rings for proper sealing. Reusing old rings is not recommended.

Is professional installation required?

Piston installation requires engine disassembly and proper torque specs. Most riders have this done by a qualified Harley tech.