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Wiseco 90-06 Yamaha YFM/YFB250 8.71 (4675M07100) Piston Kit

SKU: WISPK1054

Powersports Piston and Ring Kits

WIS Piston Sets - Powersports...

Wiseco 90-06 Yamaha YFM/YFB250 8.71 (4675M07100) Piston Kit

SKU: WISPK1054

Powersports Piston and Ring Kits

WIS Piston Sets - Powersports...

A$511.08
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 Set

Data: v4.2 - Upd: 2026-10-15 00:29:40

Features

  • 71.00 mm Bore, 8.7:1 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
PK1054
Product Attributes - Part Type
Powersports Piston and Ring Kits
Product Attributes - Product Line
Wiseco Powersports Piston Kits
Product Attributes - UPC
00193564148360
Product Attributes - Piston Material
Forged aluminum
Product Attributes - Bore (mm)
71.000mm
Product Attributes - Stroke
58.00mm
Product Attributes - Wrist Pin Style
Floating
Product Attributes - Wrist Pin Retainers Included
Yes
Product Attributes - Top Ring Material
Steel
Product Attributes - Top Ring Facing Material
Chrome
Product Attributes - Second Ring Material
Cast iron
Product Attributes - Second Ring Facing Material
Phosphate coated
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
Yes
Product Attributes - Quantity
Sold as a kit.

Reference Information

Brand Name/s Wiseco
StreetFX SKU wisPK1054
SFX Item ID 4065927
Supplier Item Code 4065927
Manufacturer SKU PK1054
Manufacturer UPC 193564148360
Alternative References YFM/YFB250, (4675M07100)

Compatibility

Application Data
  • MakeYAMAHA
    ModelYFB250FW TIMBERWOLF 4X4
    Beginning Year1999
    Ending Year2000
    Powersports Compression Ratio8.70 to 1
  • MakeYAMAHA
    ModelYFB250 TIMBERWOLF 2X4
    Beginning Year1992
    Ending Year1998
    Powersports Compression Ratio8.70 to 1
  • MakeYAMAHA
    ModelYFM250 BEAR TRACKER
    Beginning Year2000
    Ending Year2002
    Powersports Compression Ratio8.70 to 1

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