Wiseco V-Twin Piston Kit - 1200 EVO Sportster 10.5:1 Comp — Harley-Davidson Electra Glide Classic, Sportster 883, Softail Custom (1984-1999)

Wiseco forged piston kit for 1200cc EVO Sportster at 10.5:1 compression ratio, machined from high-silicon aluminum for strength and heat transfer. Direct replacement or performance upgrade for Harley-Davidson Sportster engines.

Features

• Forged high-silicon, low-expansion aluminum
• Diamond-turned finish via CNC for zero size variation
• Fits cast iron, chrome, nikasil, and boron composite cylinder bores
• Wide range of oversize options available for sleeved cylinders
• State-of-the-art forged construction

Specifications

• Brand: Wiseco
• Manufacturer Part #: K1687
• Application: 1200cc EVO Sportster
• Compression Ratio: 10.5:1
• Weight: 2.8387 lbs

Fitment

Fits Harley-Davidson Sportster models with 1200cc EVO engines.

Frequently Asked Questions

What compression ratio does this kit deliver?

10.5:1 compression, a moderate performance bump over stock without requiring premium fuel or major tune work.

Will these pistons work in my rebored cylinder?

Yes — Wiseco pistons fit cast iron, chrome, nikasil, and boron composite bores. If your cylinder is sleeved, oversize pistons are available.

Do I need a professional engine builder to install these?

Piston installation requires proper tooling and knowledge of ring gaps, piston pin fitment, and rod torque specs. A qualified shop or experienced builder is strongly recommended.

What's the weight of this kit?

2.8387 lbs for the complete piston set.