Wiseco K1692 HD Evo Forged Piston Kit Over Bore - 1340 010 3.508

The Wiseco K1692 is a complete forged piston kit designed for the Harley-Davidson 80ci (1340cc) Evolution Big Twin engine. This kit provides a +.010" oversize bore of 3.508", resulting in a displacement of approximately 1345cc, and features a domed piston design with two valve reliefs for a piston head volume of -19.00cc. It is ideal for engine rebuilds requiring a first oversize bore.

Key Features:

• Forged high-silicon aluminum construction for superior strength, reduced weight, improved heat transfer, and extended service life compared to cast pistons
• Dome piston style with two valve reliefs — -19.00cc head volume for optimal combustion chamber performance
• +.010" oversize bore (3.508") — displaces 1345cc with a 4.250" stroke
• CNC diamond-turned finish for precise sizing with no variation, compatible with cast iron, chrome, Nikasil, and boron composite cylinder bores
• Dedicated aerospace-alloy forgings engineered for superior strength-to-weight ratio with optimized skirt profiles for stability and smooth operation
• Each piston designed to proper installed clearance to maximize power output, minimize wear, and ensure optimal ring seal at operating temperature
• Grooved top ring lands to reduce detonation and improve top ring sealing
• Enlarged valve pockets provide clearance for larger valves and high-lift camshafts
• Ream-fit wrist pin holes for a geometrically precise fit
• Manufactured in the USA

Kit Includes:

• 2 forged pistons (front and rear)
• Piston rings
• Chrome piston pins
• Circlips

Specifications:

• MPN: K1692
• Bore: 3.508" (+.010" oversize)
• Displacement: 1345cc
• Stroke: 4.250"
• Piston Style: Dome with two valve reliefs
• Piston Head Volume: -19.00cc
• Piston Material: Forged aluminum
• Ring Part Numbers: 4726P1 (front) / 4727P1 (rear)
• Ring Set Part Number: 3507X

Wiseco is the only U.S. aftermarket piston manufacturer that produces pistons exclusively through the forging process, compressing the aluminum's molecular structure for a denser, stronger, and more durable end product. Combined with state-of-the-art 3D design techniques and finite element modeling, each Wiseco piston delivers maximum performance and longevity for high-demand applications.