Differential Bearing Seal Kit for Kawasaki KVF 300A/B 99-02 and KVF 400A-D 97-98 99-02 Prairie Rear 4x4/2x4

Repair the rear differential on Kawasaki Prairie KVF 300 and KVF 400 models with this Differential Bearing Seal Kit, engineered as a precise aftermarket replacement to restore oil retention and minimize gear wear. Designed for KVF 300A/B Prairie 2x4/4x4 (1999-2002) and KVF 400 series (1997-2002), it delivers a complete, ready-to-install solution that keeps your ATV performing under load on trails or on the farm. Replacing worn bearings and seals at the rear diff minimizes leaks, dirt intrusion, and downtime, so you can push harder and longer without surprise failures.

These seal-and-bearing sets are built to endure dusty, muddy backcountry conditions, featuring high-speed EMQ quality bearings with Type TC rubber seals, garter-spring inner lips, and rubber-covered outside diameter seals. The kit presents a comprehensive service option, eliminating the need to source individual parts and reducing install time—an ideal choice for riders and land managers who rely on consistent, trouble-free performance from their Prairie rear diffs.

Comprehensive Vehicle Fitment

Product Specifications

OEM & Aftermarket Cross-Reference Information

What's Included

A concise list of the components contained in the package:

• 4 x Rear Differential Bearings
• 3 x Differential Seals

Note: Related gaskets or other drive components are not included.

Why Choose This Aftermarket Replacement?

• Direct-Fit Compatibility — designed to match Kawasaki KVF Prairie rear diffs for KVF 300 and KVF 400 series, minimizing fitment surprises.
• OEM Cross-Reference — supported by multiple aftermarket cross-references (All Balls, Moose Offroad, The Big Bearing Store, Wemoto) to simplify sourcing.
• Premium Materials — EMQ high-speed bearings with Type TC rubber seals and garter-spring lips deliver reliable seals and durable rotation.
• Complete Coverage — includes both bearings and seals required to rebuild the rear differential, reducing the need for extra purchases.
• Performance Restoration — restores proper oil retention and reduces differential wear to maintain power transfer under load.
• Trail and Farm Ready — engineered to resist the harsh conditions common to prairie trails and farm work, keeping downtime to a minimum.

Installation Notes:

• Drain the differential oil and thoroughly clean the housing before installation to prevent contaminant damage.
• Use a proper bearing press and the correct adapters to seat the bearings straight, avoiding misalignment that could ruin the seal lips.
• Inspect the existing gear surfaces for scoring; replace any damaged race surfaces to avoid premature seal failure.
• Carefully orient the seals so the garter-spring side faces the oil interior and the lip faces away from contaminants; lubricate lightly with assembly grease during installation.
• Replace the oil with the manufacturer-specified viscosity and fill to the correct level after assembly to ensure proper lubrication and cooling.
• After service, perform a thorough leak check and test run to confirm a clean seal and proper gear engagement.

Why Upgrade?

Running a worn rear-diff bearing or compromised seals can lead to progressive oil leaks, dirt ingress, and accelerated gear wear, risking differential failure under load. This aftermarket kit restores the original clearances and sealing performance, re-establishing reliable lubrication and power transfer for demanding trails or farm tasks.