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The WISECO K1640 V-Twin Piston Kit is designed for 1340 Evo Big Twin applications and features an 8.5:1 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 a diamond-turned finish produced on CNC computer-controlled turning centers to help deliver a precise, consistent piston surface without size variation. The piston can be installed in cylinder bores made from cast iron, chrome, Nikasil, and boron composite materials.
For cast iron-lined cylinders, WISECO offers oversize piston options that can help extend cylinder life. Chrome, Nikasil, and boron composite cylinders may also be resleeved to accept WISECO oversize pistons when replacement cylinder sleeves are available. The WISECO K1640 reflects the brand’s focus on forged piston manufacturing for high-performance racers and recreational enthusiasts.
Features:
- Forged high-silicon, low-expansion aluminum construction for strength, reduced weight, improved heat transfer, and longer life
- Diamond-turned finish produced on CNC computer-controlled turning centers
- Designed for 1340 Evo Big Twin applications
- 8.5:1 compression ratio
- Suitable for cylinder bores made from cast iron, chrome, Nikasil, and boron composite materials
- WISECO oversize piston options can help extend the life of cast iron-lined cylinders
- Chrome, Nikasil, and boron composite cylinders can be resleeved to accept WISECO oversize pistons

