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

WISECO forged piston set for Harley-Davidson FXR 1340

This WISECO piston set is intended for the Harley-Davidson BIG Twin EVO FXR 1340 built between 1984 and 1991. The forged version belongs to the upper engine range and can be specifically selected based on clearly defined dimensions and compression data.

The piston diameter is exactly Ø 89.35 mm. The oversize is +0.50. This means that the crucial dimensions can be compared directly with the intended engine configuration before selection. The compression ratio is 8.5:1, while piston compression is standard.

Technical features

• 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 FXR 1340
• Years of construction: 1984 to 1991

Notes on selection

Diameter, oversize and compression ratio are the key technical data of this forged piston set. Before selection, Ø 89.35 mm, the oversize dimension +0.50 and the compression ratio 8.5:1 should be compared with the requirements of the engine in question. The clear assignment to the Harley-Davidson BIG Twin EVO FXR 1340 applies to the entire model year range from 1984 to 1991.