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Wiseco PK1113 Forged Piston Kit 100.5mm 11:1 CR Yamaha Grizzly/Rhino 660 (4737M)

(Yamaha YXR66F Rhino 660 2005-07, YXR66F Rhino 660 Special Edition 2006-07, YFM660F Grizzly 4x4 2002-08, YXR66F Rhino 660 Ducks Unlimited 2007 + 2 more models)

Manufacturer

Picture for manufacturer Wiseco Pistons

Part Number

PK1113
9 reviews
Sale Price

$352.99

Estimated ship date Friday, November 27

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Product Details

The Wiseco PK1113 is a high-compression forged piston kit designed for the Yamaha Grizzly and Rhino 660 ATV platforms. Featuring a 100.50mm bore diameter and an 11.0:1 compression ratio, this kit delivers a meaningful performance upgrade over the stock cast piston, making it an ideal choice for riders seeking improved throttle response and top-end power.

Wiseco pistons are forged entirely in-house in the USA, allowing complete control over every stage of the manufacturing process — from raw billet to finished part. Each piston features Wiseco's ArmorGlide skirt coating, which reduces friction, improves heat transfer, and extends piston life even under demanding operating conditions.

Key Features:

  • Bore Diameter: 100.50mm (oversized)
  • Compression Ratio: 11.0:1 (high compression)
  • Forging Number: 4737M
  • USA-forged construction for superior strength, impact resistance, and fatigue life vs. cast pistons
  • ArmorGlide skirt coating for reduced friction and improved durability
  • Optimized strength-to-weight ratio for high-performance ATV applications
  • In-house dyno testing and R&D ensure fitment and performance accuracy

Kit Includes:

  • Forged piston
  • Piston rings
  • Wrist pin
  • Circlips

Wiseco's vertically integrated manufacturing — from forge tooling to skirt coating — ensures that every PK1113 kit meets strict quality standards. Whether you're rebuilding after wear or upgrading for performance, this piston kit is a proven solution for the Yamaha 660 engine platform.

Products specifications

Fits

Yamaha YXR66F Rhino 660 2005-07, YXR66F Rhino 660 Special Edition 2006-07, YFM660F Grizzly 4x4 2002-08, YXR66F Rhino 660 Ducks Unlimited 2007, YXR66F Rhino 660 Exploring Edition 2006-07, YXR66F Rhino 660 Sport Edition 2007

Piston Material

2618

Prop 65

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

Bore Diameter

100.50

Engine Type

ICE

Industry

Powersports

Out of Stock Message

Estimated Shipped Date 3-4 Weeks

Piston oversize

0.50

Product Series

4 Stroke Forged Series

Product Type

Top End Kits

Product Market

ATV/UTV

EBAY Category ID

180159

Compression Ratio Actual

11:1

Piston Diameter

100.42

Title

Wiseco 4 Stroke Forged Series Piston Kit, 100.50 MM Bore, 11:1 CR

Included Components

Piston #4737M10050, Ring Set #10050XS, Wrist Pin #S655, CirClip #CW22, Gasket #W6428

Title - Web

Yamaha Wiseco Top End Kit - 100.50 mm Bore

Size

100.5

Quick and efficient

great

So far so good, easy website to navigate

first time buyer. will use again and refer to others

Easy to navigate website.

Autoplicity had the Readylift kit I needed at the best price I could find. They shipped it very quickly as well. I am very pleased with this transaction.

You have what I need.

Ordered 4 race ramps flatstoppers for winter storage of my Dodge Viper. Product prevents flat spots on auto tires that are stored more than 30 days. Order process was extremely easy, product was promptly shipped. I'll definately do business with Autoplicity in the future.

Quick and easy

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