Ball Joint Kit for Yamaha YFM660 Grizzly 02-08 — premium lower ball joint replacement designed to restore steering precision and front suspension alignment when the originals wear out. This two-piece kit fits Yamaha YFM660 Grizzly models from 2002 through 2008 and replaces the OEM part 5KM-23579-00-00 (also cataloged as 5KM235790000). Built for durability in off-road conditions, it’s a straightforward fix to keep your front end tight and predictable.

Vehicle Fitment Information

• Make: Yamaha
• Model: YFM660 Grizzly
• Year Range: 2002–2008
• Notes: Front lower ball joint kit replacement for the YFM660 Grizzly’s suspension

Product Specification

• Lower ball joint kit for Yamaha YFM660 Grizzly (02-08)
• 1 ball joints per kit
• Material: Steel construction
• OEM Reference: 5KM-23579-00-00
• Alternate OEM Reference: 5KM235790000

OEM & Aftermarket Reference Part Numbers

• OEM: 5KM-23579-00-00; 5KM235790000
• Aftermarket / Equivalents: All Balls Racing 42-1034; Bronco AT-08809; Bronco AT-08801; Arrowhead 42-1034

Why Buy?

• Direct OEM-grade replacement for the Yamaha YFM660 Grizzly’s worn front lower ball joints, restoring precise steering and stable suspension.
• Includes 1 lower ball joint, delivering a complete front-end refresh and eliminating excess play that can cause tire wear and handling issues.
• Durable steel construction designed for demanding off-road use, helping your ATV maintain reliable performance under rough conditions.
• Sensitive to OEM geometry, ensuring proper alignment and compatibility with the Yamaha front-end design for easier installation.
• Broad aftermarket equivalents provide flexible sourcing options if you’re stocking parts for a repair shop or personal rebuild project.