Wiseco V-Twin Piston Kit - EVO 883 / 1200 9.5:1 '1986-2011 — Harley-Davidson (1986-2011)

Wiseco forged piston kit for Harley-Davidson EVO 883 and 1200cc engines, 9.5:1 compression ratio, 1986–2011 model years. High-silicon aluminum construction delivers superior strength, reduced weight, and improved heat transfer for reliable street and performance riding.

Features

• Forged high-silicon, low-expansion aluminum
• Diamond-turned finish with zero size variation
• Compatible with cast iron, chrome, nikasil, and boron composite cylinder bores
• CNC computer-controlled manufacturing
• Available in oversize options for cylinder sleeve applications

Specifications

• Brand: Wiseco
• Manufacturer Part #: K1655
• Engine: Harley EVO 883 / 1200
• Compression Ratio: 9.5:1
• Weight: 2.794 lbs

Fitment

Fits Harley-Davidson EVO 883 and 1200 models, 1986 through 2011 model years.

Frequently Asked Questions

What cylinder bores are these compatible with?

Wiseco pistons work in cast iron, chrome, nikasil, and boron composite cylinder bores without modification.

Can I use these in an oversized bore?

Yes. Wiseco offers oversize piston options. If your cylinders are re-sleeved, oversizes are available to match.

Do these require a tuner or ECU change?

Piston compression ratio is 9.5:1 — verify your engine build and fuel type before installation. Consult your engine builder if modifying from stock.

Will these fit my 2012+ EVO 1200?

This kit is for 1986–2011 EVO models. 2012 and newer Sportster models use different piston architectures.