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The WISECO V-Twin Piston Kit K1746 is designed for the 1200 Sportster and features a 10.5:1 compression ratio. This forged piston is manufactured from high-silicon, low-expansion aluminum to provide superior strength, reduced weight, improved heat transfer, and extended service life.
WISECO uses diamond-turning processes on CNC computer-controlled turning centers to produce a consistent, high-quality finish with no size variation. The piston is suitable for use with cast iron, chrome, Nikasil, and boron composite cylinder bore compositions.
WISECO offers a broad range of oversize pistons to help extend the service life of cast iron-lined cylinders. With replacement cylinder sleeves, chrome, Nikasil, and boron composite cylinders can also be resleeved to accept WISECO oversize pistons. The WISECO manufacturing facility supplies forged pistons for both high-performance racing and recreational applications.
Features:
- Forged high-silicon, low-expansion aluminum construction provides superior strength, reduced weight, improved heat transfer, and longer life.
- Diamond-turned finish produced using CNC computer-controlled turning centers for consistent sizing and a precise finish.
- Designed for use with cast iron, chrome, Nikasil, and boron composite cylinder bore compositions.
- Oversize piston range can increase the service life of cast iron-lined cylinders and support resleeved chrome, Nikasil, and boron composite cylinders.
- 10.5:1 compression ratio for 1200 Sportster applications.
- WISECO part K1746.

