Wiseco 1200 Sportster 10.5:1 Compression Piston Kit - K1746 - Harley Sportster

This Wiseco K1746 is a forged piston kit with a 10.5:1 compression ratio, made from high-silicon aluminum for strength and heat transfer. The forged construction is intended to give the piston durability under load, and the high-silicon aluminum is chosen for its heat transfer properties, which help the piston shed heat and support engine longevity.

The 10.5:1 compression ratio is the main reason riders choose this kit, offering a higher compression level for a noticeable increase in usable power. The kit works with all common cylinder bore materials, which makes it a flexible option for different builds. Oversize availability is offered for re-sleeved cylinders, giving builders more options when the cylinder bore has been refinished.

The piston is designed to be lighter while still providing the strength expected from a forged piece, and the improved heat dissipation supports long-term reliability in V-twin applications. Riders looking to refresh the top end of an engine will find this kit a solid choice for restoration or performance work. Installation and tuning decisions should be made with the rest of the engine build in mind.

For off-road / closed-course race use only.

Specifications

• Brand: Wiseco
• Part Number: K1746
• Category: Piston kits & Components
• Compression Ratio: 10.5:1
• Material: High-silicon aluminum
• Construction: Forged
• Weight: 3.3755 lbs

Common questions