Wiseco V-Twin Piston Kit - 1200 Sportster 10.5:1 Comp — Harley-Davidson Sportster 1200 Custom, Sportster 883, Sportster 883 Hugger (1972-2026)

Wiseco forged piston kit for Harley-Davidson 1200 Sportster engines with 10.5:1 compression ratio. Built from high-silicon aluminum for strength and heat transfer, with a diamond-turned finish machined to zero size variation.

Features

• High-silicon, low-expansion aluminum forged construction
• Diamond-turned finish from CNC machining
• Compatible with cast iron, chrome, nikasil, and boron composite cylinder bores
• Superior strength and reduced weight vs. cast pistons
• Longer engine life and improved heat dissipation

Specifications

• Brand: Wiseco
• Manufacturer Part #: K1747
• Compression Ratio: 10.5:1
• Application: 1200 Sportster
• Length: 9.6 in
• Width: 4.9 in
• Height: 4.1 in
• Weight: 2.4 lbs

Fitment

Fits Harley-Davidson 1200 Sportster models with 10.5:1 compression ratio.

Frequently Asked Questions

Will these pistons fit my 883 Sportster?

No — this kit is specifically for 1200 Sportster engines. 883 models require a different piston kit.

Can I use these in a nikasil-plated cylinder?

Yes. Wiseco pistons are compatible with nikasil, chrome, boron composite, and cast-iron cylinder bores.

Do these need special break-in procedures?

Follow standard break-in for any forged piston — gradual throttle application for the first 500 miles to seat rings properly.

What compression ratio do I get with these pistons?

10.5:1 compression ratio as specified. Verify your cylinder and head combination supports this ratio before installation.