Wiseco 18-19 Yamaha YZ450F 12.81 CR (40199M) Piston Kit

SKU: WISPK1933

Powersports Piston and Ring Kits

WIS Piston Sets - Powersports...

Wiseco

Wiseco 18-19 Yamaha YZ450F 12.81 CR (40199M) Piston Kit

SKU: WISPK1933

Powersports Piston and Ring Kits

WIS Piston Sets - Powersports...

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Description

The Wiseco team has remained at the forefront of powersports performance through every era and evolution, including the development of high-performance 4-strokes. Today, Wiseco's forged 4-stroke pistons are designed for each specific engine application and built to the tightest tolerances for the ultimate combination of performance and strength. Proven at every level of riding, Wiseco 4-stroke pistons are ready to deliver the power and reliability you're looking for.

Part Type

Engine Piston Set

Data: v4.2 - Upd: 2026-10-15 00:31:33

Features

Dedicated forgings allow for optimized strength-to-weight ratio
Designed and built for each specific 4-stroke powersports engine
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

Specifications

Product Attributes - Brand: Wiseco
Product Attributes - Manufacturer's Part Number: PK1933
Product Attributes - Part Type: Powersports Piston and Ring Kits
Product Attributes - Product Line: Wiseco Powersports 4-Stroke Forged Series Piston Kits
Product Attributes - UPC: 193564155085
Product Attributes - Piston Material: Forged aluminum
Product Attributes - Bore (in.): 3.819 in.
Product Attributes - Bore (mm): 97.000mm
Product Attributes - Stroke: 60.80mm
Product Attributes - Wrist Pin Style: Floating
Product Attributes - Pin Diameter (in.): 0.708 in.
Product Attributes - Wrist Pin Retainers Included: Yes
Product Attributes - Top Ring Thickness: 1.2mm
Product Attributes - Top Ring Material: Steel
Product Attributes - Second Ring Thickness: 1.5mm
Product Attributes - Second Ring Material: Cast iron
Product Attributes - Oil Ring Material: Stainless steel
Product Attributes - Oil Ring Thickness: 2.0mm
Product Attributes - File Fit: No
Product Attributes - Gapless: No
Product Attributes - Gaskets Included: Yes
Product Attributes - Quantity: Sold as a kit.

Reference Information

Brand Name/s	Wiseco
StreetFX SKU	wisPK1933
SFX Item ID	4065146
Supplier Item Code	4065146
Manufacturer SKU	PK1933
Manufacturer UPC	193564155085
Alternative References	YZ450F, (40199M)