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Wiseco PK1072 96mm 12.0:1 ATV Forged Piston Kit with Top-End Gasket Kit

(Yamaha YFZ450 2004-09, YFZ450R 2009, YZ450F 2004-09, YXR45F Rhino 450 2006-09, YFZ450R SE 2009, YFZ450 Bill Balance Edition 2006-07 + 2 more models)

Manufacturer

Picture for manufacturer Wiseco Pistons

Part Number

PK1072
9 reviews
Sale Price

$327.99

Estimated ship date Friday, November 27

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Product Details

The Wiseco PK1072 is a complete forged piston kit designed for the 2004–2009 Yamaha YFZ450, featuring a 96.00mm overbore and a 12.0:1 compression ratio. This kit includes everything needed for a top-end rebuild: a forged aluminum piston, piston rings, wrist pin, circlips, and a full top-end gasket set — so you can tear down and reassemble with confidence.

Why Forged — Not Cast:

  • Superior strength-to-weight ratio — each piston is designed to maximize performance without adding unnecessary mass
  • Condensed, directional grain structure — aligned to the geometry of the part for greater resistance to impact and fatigue
  • No catastrophic failure mode — unlike brittle cast pistons that crack suddenly when yield strength is exceeded, forgings deform progressively under extreme load
  • Skirt coating applied in-house — reduces friction and wear from first startup

Wiseco Manufacturing Advantage:

  • All pistons are forged and all forge tooling is produced entirely in-house in the USA
  • Full control of the manufacturing process from raw bar stock to finished, coated parts
  • In-house dyno testing drives continuous development of new shapes, coatings, and components
  • 3D design techniques and finite element modeling (FEM) are used to optimize every piston geometry

Kit Includes:

  • Forged aluminum piston (96.00mm)
  • Piston rings
  • Wrist pin
  • Circlips
  • Top-end gasket set

The Wiseco PK1072 is the right choice for YFZ450 riders who demand proven durability through hard trail riding, desert racing, or motocross-style ATV competition. Wiseco part number PK1072, also referenced as forging code 4865M.

Products specifications

Fits

Yamaha YFZ450 2004-09, YFZ450R 2009, YZ450F 2004-09, YXR45F Rhino 450 2006-09, YFZ450R SE 2009, YFZ450 Bill Balance Edition 2006-07, YFZ450 SE 2007-08, YXR45F Rhino 450 Special Edition 2007-08

Piston Material

2618

Prop 65

WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov

Bore Diameter

96.00

Engine Type

ICE

Industry

Powersports

Out of Stock Message

Estimated Shipped Date 3-4 Weeks

Skirt Coating

Yes

Product Series

4 Stroke Forged Series

Product Type

Top End Kits

Product Market

ATV/UTV

EBAY Category ID

180159

Piston oversize

1.00

Compression Ratio Actual

11.4:1

Piston Diameter

95.94

Title

Wiseco 4 Stroke Forged Series Piston Kit, 96.00 MM Bore, 11.4:1 CR

Included Components

Piston #4865M09600, Ring Set #9600XS, Wrist Pin #S641, CirClip #CW20, Gasket #W6248

Title - Web

Yamaha Wiseco Top End Kit - 96.00 mm Bore

Size

96.0

Found that you priced this fender flare cheaper on you Website than the listing on Ebay. I am satisfied and hope that my payment and shipping processed quickly to receive my fender flares soon as possible. Thank you.

Quick and easy

Work well

N/a

easy to use the amazon link to pay

Great experience so far

Easy to find and order what I needed.

Very pleased so far thanks

Great

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