Harley-Davidson Big Twin 1340 Wiseco Top End Kit

Wiseco Piston Kit – VT1745

The Wiseco VT17454 Piston Kit is a high-performance forged upgrade engineered for Harley-Davidson Twin Cam engines. Designed for durability and efficiency under extreme conditions, this kit delivers improved throttle response, reduced friction, and long-term reliability—making it ideal for both rebuilds and performance builds.

Manufactured using Wiseco’s advanced forging process, the VT1745 offers superior strength over cast pistons, ensuring consistent performance under heat and load. Supplied as a complete kit, it includes everything required for a quality top-end rebuild.

Fitment & Specifications

• Harley-Davidson Evolution Big Twin (1340cc / 80ci)
• Models: Softail, Touring & Dyna
• Years: 1984–1999
• Bore Size: 3.498" (standard or oversize options available)
• Compression Ratio: Approx. 8.5:1 – 9.0:1 (depending on configuration)

(Fitment may vary depending on bore size and engine setup – always confirm before installation)

Key Features

✔ Forged piston construction for superior strength
✔ Designed for Evolution Big Twin engines
✔ Excellent heat resistance and durability
✔ Reduced friction for smoother engine operation
✔ Ideal for rebuilds and reliability upgrades

Kit Includes

• Forged pistons
• Piston rings
• Wrist pins
• Circlips