Wiseco Harley 1340 (3537X-4724/4725P4) Piston Kit

SKU: WISK1669

Powersports Piston and Ring Kits

WIS Piston Sets - Powersports...

Wiseco

Wiseco Harley 1340 (3537X-4724/4725P4) Piston Kit

SKU: WISK1669

Powersports Piston and Ring Kits

WIS Piston Sets - Powersports...

Special Order. Contact for ETA. This item is out of stock in our warehouse and partner distribution centres. In some cases, this may be due to not having live inventory feeds available for all suppliers. Please contact us before ordering if you need to meet a specific deadline.

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Description

V-Twin performance has been around since some of the earliest days of motorcycle racing and engine modification, and Wiseco has been there since the beginning. Applying over 80 years of experience, Wiseco has fine-tuned its V-Twin pistons for each specific engine platform to optimize performance and durability. From reliable rebuilds to all-out race, Wiseco has the pistons for your V-Twin build.

Part Type

Engine Piston Set

Data: v4.2 - Upd: 2026-10-13 16:57:23

Features

3.538 in. Bore, 10:1 CR
Dedicated forgings allow for optimized strength-to-weight ratio
Designed and built for each specific 4-stroke powersports engine
Designed and built specifically for each V-Twin engine platform
Engineered, forged, and machined in the USA in Mentor, OH
Improved tensile strength of forged material optimizes strength and service life
Includes high-quality piston rings, wrist pin(s), and circlips
Optimized compression ratio to fit your build and performance goals
Wrist pin, rings and circlips included

Specifications

Product Attributes - Brand: Wiseco
Product Attributes - Manufacturer's Part Number: K1669
Product Attributes - Part Type: Powersports Piston and Ring Kits
Product Attributes - Product Line: Wiseco Powersports Piston Kits
Product Attributes - UPC: 00193564149848
Product Attributes - Piston Material: Forged aluminum
Product Attributes - Bore (in.): 3.538 in.
Product Attributes - Wrist Pin Style: Floating
Product Attributes - Wrist Pin Retainers Included: Yes
Product Attributes - Top Ring Material: Cast iron
Product Attributes - Top Ring Facing Material: Moly
Product Attributes - Second Ring Material: Cast iron
Product Attributes - Second Ring Facing Material: Cast iron
Product Attributes - Oil Ring Material: Stainless steel
Product Attributes - Oil Ring Facing Material: Chrome
Product Attributes - File Fit: No
Product Attributes - Gapless: No
Product Attributes - Gaskets Included: No
Product Attributes - Quantity: Sold as a kit.
Product Attributes - Notes: Kit includes 2 pistons, rings, circle clips, and 2 wrist pins.

Reference Information

Brand Name/s	Wiseco
StreetFX SKU	wisK1669
SFX Item ID	4066424
Supplier Item Code	4066424
Manufacturer SKU	K1669
Manufacturer UPC	193564149848
Alternative References	(3537X-4724/4725P4)