Harley-Davidson BIG Twin EVO 1340 [1984-1999] - Set of forged pistons Ø89.35mm - K1642

WISECO forged piston set for Harley-Davidson BIG Twin EVO 1340

This WISECO piston set is intended for the Harley-Davidson BIG Twin EVO 1340 built between 1984 and 1999. The forged design combines a piston diameter of 89.35 mm with standard piston compression. The reported compression ratio is 8.5:1.

Execution and function

The set is assigned to the upper engine area and is designed for use as engine pistons. With the oversize measurement +0.50, it offers a clearly defined size variant. The technical characteristics enable a targeted selection based on the intended engine configuration.

• Piston Type: Forged
• Piston compression: standard
• Diameter Ø: 89.35 mm
• Oversize: +0.50
• Compression ratio: 8.5:1

Vehicle assignment

• Harley-Davidson BIG Twin EVO 1340
• Year of manufacture: 1984-1999

The complete year of construction makes it easier to narrow down engine work on the BIG Twin EVO version mentioned. The diameter of 89.35 mm, the oversize dimension +0.50 and the standard piston compression are particularly important for the product selection.

Factual selection instructions

Before use, the piston diameter, oversize and compression ratio should be compared to the intended engine design. This means that the forged piston set can be clearly selected for the respective engine configuration based on its documented dimensions and compression data.