Wiseco V-Twin Piston Kit - 1340 EVO BIG Twin 8.5:1 Comp — Harley-Davidson Electra Glide Classic, Softail Custom, Softail Heritage Classic (1984-1999)

Wiseco forged piston kit for 1340cc Evolution Big Twin engines at 8.5:1 compression ratio. Built from high-silicon, low-expansion aluminum for superior strength and heat transfer compared to cast pistons.

Features

• Forged from high-silicon, low-expansion aluminum
• Diamond-turned finish with CNC precision
• Compatible with cast iron, chrome, nikasil, and boron composite cylinders
• Oversizes available for resleeved cylinders
• State-of-the-art forged construction

Specifications

• Brand: Wiseco
• Manufacturer Part #: K1642
• Engine: 1340cc Evolution Big Twin
• Compression Ratio: 8.5:1
• Weight: 2.975 lbs

Fitment

Fits V-twin motorcycles with 1340cc Evolution Big Twin engines. Compatible with cast iron, chrome, nikasil, and boron composite cylinder bores.

Frequently Asked Questions

What compression ratio is this kit?

8.5:1 compression ratio, suitable for street performance on pump gasoline.

Can these pistons be installed in any cylinder type?

Yes — Wiseco pistons work in cast iron, chrome, nikasil, and boron composite cylinders without issue.

Are oversizes available if I need to rebore?

Yes. Wiseco offers oversize pistons, and cylinders can be resleeved to accept them.

Is this a complete piston kit with rings and pins?

This is a piston kit from Wiseco — verify contents and check if rings, pins, and clips are included or sold separately.