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 1200cc Harley Sportster engines at 10.5:1 compression ratio. High-silicon aluminum construction with diamond-turned finish delivers superior strength and heat transfer for reliable performance.

Features

• High-silicon, low-expansion aluminum forging
• Diamond-turned finish from CNC machining
• Compatible with cast iron, chrome, nikasil, and boron composite cylinder bores
• Reduced weight with improved heat transfer
• Oversize availability for cylinder resleeving applications

Specifications

• Brand: Wiseco
• Manufacturer Part #: K1748
• Compression Ratio: 10.5:1
• Application: 1200cc Sportster
• Weight: 2.5836 lbs

Fitment

Fits Harley-Davidson 1200cc Sportster v-twin engines. Verify specific model year and cylinder bore size before ordering.

Frequently Asked Questions

What compression ratio is this kit?

10.5:1 compression ratio, suitable for stock and moderately boosted 1200 Sportster builds.

Can I use these pistons in different cylinder types?

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

Do I need to resize my cylinders?

Verify your current bore size. If you need oversize pistons, your cylinders can be bored or resleeved to accept Wiseco's larger sizes.

Is this a complete kit or just the pistons?

This is a piston kit — confirm what additional components (rings, pins, clips) are included with your order.