MGWILL Ball Joint Kit for Honda Rancher 350/400/420 — Set of 4 Upper & Lower OE-fit with Boots

MGWILL's Ball Joint Kit supplies four direct-replacement upper and lower ball joints engineered to restore steering precision and front suspension stability on compatible Honda Rancher 350, 400 and 420 models.

This kit is a complete front suspension refresh for owners and technicians who need reliable, OE-style fitment without searching multiple part numbers. Designed to replace Honda part numbers 51375-HP5-601 and 51355-HP5-601, the set includes four ball joints plus rubber boots, cotter pins and nuts so you have the core hardware to return your ATV to safe, predictable handling. Review the fitment list carefully to confirm compatibility with your Rancher model year and trim before ordering.

Which Rancher models does this kit fit?

The MGWILL set covers many Rancher model years and trims. It fits a range of 2000–2006 Rancher 350 variants, 2004–2007 Rancher 400 versions, and 2007–2014 Rancher 420 versions—see the full fitment list provided. Double-check your VIN or existing parts to be certain of correct application.

• 2000–2006 TRX350FE/ FM/ TE/ TM Rancher 350 models
• 2004–2007 TRX400FA/ FGA Rancher 400 models
• 2007–2014 TRX420FA/ FE/ FM/ FPA/ FPE/ FPM/ TE/ TM Rancher 420 models
• Replaces OEM part numbers 51355-HP5-601 and 51375-HP5-601

What are the ball joint specifications and materials?

Each ball joint in this kit matches the dimensional and thread standards used on the OEM assemblies. Critical measurements and materials are listed to help confirm alignment with your vehicle's requirements.

• Positions included: Upper and Lower ball joints
• Heights: Upper 66 mm, Lower 71 mm
• Thread size: Upper M12 x 1.25-6g, Lower M12 x 1.25-6g
• Boots made from chloroprene rubber (CR) for weather and oil resistance

What comes in the kit and what about installation?

The package supplies the four ball joints and the small hardware needed for assembly, but no printed installation instructions. A professional installation is recommended if you don’t have the correct tools or experience removing and installing suspension joints.

• Included: 4 ball joints, 4 rubber boots, cotter pins and nuts
• No installation instructions included — professional install recommended
• Use proper presses and torque specs for safe, long-lasting installation
• Confirm fitment prior to disassembly to avoid returns or delays

How will replacing these ball joints affect ride and handling?

Replacing worn or loose ball joints reduces play in the steering and stabilizes wheel alignment, helping the ATV track truer over uneven terrain. Fresh joints also help prevent accelerated tire wear and reduce vibration transmitted through the front end.

• Reduces steering wander and improves directional control
• Helps restore correct wheel camber and toe settings
• Minimizes front-end noise, looseness and vibration
• Extends life of adjacent suspension components and tires

Who is this for: This MGWILL Ball Joint Kit is intended for Honda Rancher owners, DIY mechanics, and ATV repair shops who need a reliable, direct-fit replacement for worn upper and lower ball joints. It’s ideal when restoring front-end stability on eligible 350, 400 and 420 Rancher models, or when preparing a machine for trail work, hauling or resale. If you’re unsure about fitment or lack the proper tools, consult a qualified technician prior to purchase and installation.