Piston Pin Compatible With 2002-2008 Yamaha Grizzly 660 4-Stroke Atv 22Mm Wrist Pin 3Yf-11633-00-00

Manufacturer Part Number:
04.2270

Cross-Reference OEM Part Numbers:
Yamaha: 3YF-11633-00-00
Yamaha: 3YF-11633-01-00

Pin Specifications:
• Outer Diameter: 22mm
• Material: Case-hardened chrome steel

Engine Specifications:
• 660cc SOHC 4-Valve 4-Stroke Single Cylinder — Liquid/Air Cooled
• Bore × Stroke: 100mm × 84mm
• Compression Ratio: 9.1:1
• Same engine platform across all Grizzly 660, Raptor 660, and Rhino 660 models

Notes:
• One piston pin fits ALL Yamaha 660cc models — Grizzly, Raptor, and Rhino
• Includes all special editions (Ducks Unlimited, Hunter, LE, SE, Wetland, Exploring)
• Replace during top-end rebuild or when pin shows wear
• Always replace circlips when removing pin

Function:
The piston pin (wrist pin) connects the piston to the connecting rod small end, transferring combustion force while allowing the rod to pivot. A worn or scored pin causes knocking, accelerated bore wear, and potential catastrophic failure.

When to Replace:
• During any top-end rebuild (piston, rings, cylinder re-bore/re-plate)
• When pin shows visible wear, scoring, discoloration, or blue heat marks
• When pin has measurable play in the connecting rod small end bearing

Installation Notes:
• Always replace piston pin circlips — never reuse old circlips
• Apply assembly oil to pin before installation
• Ensure circlips are fully seated — improper seating causes engine damage
• Verify connecting rod small end bearing condition before reassembly
• 660cc singles produce high loads — use proper torque values during assembly

PRODUCT NOTICE:
As a parts distributor we mostly sell aftermarket parts (any OEM parts would be noted as such). Aftermarket parts are not sourced from the original vehicle or equipment manufacturer, but are designed to function the same as - if not better than - the original. All parts sold are new.

WARNING - This product may expose you to chemicals which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov