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Wiseco Yamaha YFM350 Warrior/Raptor 87-13 121 CR Piston Kit

SKU: WIS40123M08400

Powersports Piston and Ring Kits

WIS Piston Sets - Powersports

Wiseco Yamaha YFM350 Warrior/Raptor 87-13 121 CR Piston Kit

SKU: WIS40123M08400

Powersports Piston and Ring Kits

WIS Piston Sets - Powersports

A$426.65
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

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

Data: v4.2 - Upd: 2026-09-30 17:37:54

Features

  • 84.00 mm Bore, 12:1 CR
  • Complete Package: Each piston includes a wrist pin, rings, and circlips, providing everything needed for installation
  • 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
  • Forged Material: Optimizes strength and service life, ensuring durability under high-stress conditions
  • Improved tensile strength of forged material optimizes strength and service life
  • Includes high-quality piston rings, wrist pin(s), and circlips
  • Performance-Enhancing Features: Varied across applications to maximize both durability and power

Specifications

Product Attributes - Brand
Wiseco
Product Attributes - Manufacturer's Part Number
40123M08400
Product Attributes - Part Type
Powersports Piston and Ring Kits
Product Attributes - Product Line
Wiseco Powersports 4-Stroke Forged Series Piston Kits
Product Attributes - UPC
193564124784
Product Attributes - Piston Material
Forged aluminum
Product Attributes - Bore (in.)
3.307 in.
Product Attributes - Bore (mm)
84.000mm
Product Attributes - Stroke
64.50mm
Product Attributes - Wrist Pin Style
Floating
Product Attributes - Pin Diameter (in.)
0.748 in.
Product Attributes - Wrist Pin Retainers Included
Yes
Product Attributes - Top Ring Thickness
1.0mm
Product Attributes - Top Ring Material
Steel
Product Attributes - Second Ring Thickness
1.2mm
Product Attributes - Second Ring Material
Iron
Product Attributes - Oil Ring Material
Stainless steel
Product Attributes - Oil Ring Thickness
2.8mm
Product Attributes - File Fit
No
Product Attributes - Gapless
No
Product Attributes - Gaskets Included
No
Product Attributes - Quantity
Sold as a kit.

Reference Information

Brand Name/s Wiseco
StreetFX SKU wis40123M08400
SFX Item ID 4067670
Supplier Item Code 4067670
Manufacturer SKU 40123M08400
Manufacturer UPC 193564124784
Alternative References YFM350

Compatibility

Application Data
  • MakeYAMAHA
    ModelBW350
    Beginning Year1987
    Ending Year1988
    Powersports Compression Ratio12.00 to 1
  • MakeYAMAHA
    ModelYFM350 BRUIN AUTO 2X4
    Beginning Year2004
    Ending Year2006
    Powersports Compression Ratio12.00 to 1
  • MakeYAMAHA
    ModelYFM350ER MOTO-4
    Beginning Year1987
    Ending Year1995
    Powersports Compression Ratio12.00 to 1
  • MakeYAMAHA
    ModelYFM350FA BRUIN AUTO 4X4
    Beginning Year2004
    Ending Year2006
    Powersports Compression Ratio12.00 to 1
  • MakeYAMAHA
    ModelYFM350FW BIG BEAR 4X4
    Beginning Year1989
    Ending Year1999
    Powersports Compression Ratio12.00 to 1
  • MakeYAMAHA
    ModelYFM350 GRIZZLY 4X4 AUTO
    Beginning Year2007
    Ending Year2014
    Powersports Compression Ratio12.00 to 1
  • MakeYAMAHA
    ModelYFM350 GRIZZLY AUTO
    Beginning Year2007
    Ending Year2014
    Powersports Compression Ratio12.00 to 1
  • MakeYAMAHA
    ModelYFM350 GRIZZLY IRS 4X4 AUTO
    Beginning Year2007
    Ending Year2012
    Powersports Compression Ratio12.00 to 1
  • MakeYAMAHA
    ModelYFM350 RAPTOR
    Beginning Year2005
    Ending Year2013
    Powersports Compression Ratio12.00 to 1
  • MakeYAMAHA
    ModelYFM350U BIG BEAR 2X4
    Beginning Year1996
    Ending Year1999
    Powersports Compression Ratio12.00 to 1
  • MakeYAMAHA
    ModelYFM350X WARRIOR
    Beginning Year1987
    Ending Year2004
    Powersports Compression Ratio12.00 to 1

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