Harley-Davidson BIG Twin EVO FX 1340 [1984-1991] - Set of forged pistons Ø89.35mm - K1642

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

This WISECO piston set is assigned to the upper engine area of the Harley-Davidson BIG Twin EVO FX 1340. The pistons are forged and have standard compression. With a diameter of 89.35 mm, the oversize value +0.50 and the compression ratio 8.5:1, the essential technical dimensions for a clear selection are fixed.

Execution and function

The set is intended for use as a piston component in the engine. The forged version describes the manufacturing method of the piston. Standard compression and the specified compression ratio support the targeted comparison with the intended engine configuration.

Technical data

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

Vehicle assignment

Suitable for the Harley-Davidson BIG Twin EVO FX 1340 from 1984-1991. The complete year range, together with engine type, piston diameter, oversize and compression ratio, serves as the basis for selection.

Factual selection instructions

Before use, the required diameter of 89.35 mm and the oversize value +0.50 should be compared with the intended motor configuration. The standard compression and the compression ratio of 8.5:1 are also crucial features for the correct assignment of this forged piston set.