MOTO1988 Upper Steering Bushing & Bracket Kit for Polaris — 1-inch Shaft, Direct-Fit OEM 5439731/5257028, Restores Tight Steering

Upper steering bushing and bracket assembly designed to replace worn OEM steering bushings on many Polaris ATVs and UTVs, restoring tighter steering feel and proper alignment. This MOTO1988 replacement set (manufacturer part numbers 5439731, 5257028) includes two steering bushings, one bushing bracket and one 7555878 bushing to match Polaris 1-inch steering shafts used across a long list of Sportsman, Ranger, RZR, Scrambler, Trail Boss and other models. The kit is made as a direct-fit aftermarket replacement to restore steering centering and reduce play where the upper steering column meets the chassis. Before purchasing, confirm fit by comparing model years and OEM numbers with your vehicle.

Which Polaris models will this upper steering bushing and bracket fit?

This assembly covers a broad range of Polaris models across many years, primarily those using a 1-inch steering shaft. It fits Sportsman (300–1000 ranges), Scrambler, Ranger, RZR, Trail Boss, Trail Blazer, Magnum, Predator, Hawkeye and several utility models listed by year in the product details.

• Examples: Sportsman 400/500/570/850/1000, Ranger 400/500/700/800/1000, RZR 570/800, Scrambler 400/500/850/1000.
• Check specific exclusions: some High Lifter and mid/full-size exceptions noted for certain years.
• Verify by OEM numbers: 5439731, 5257028, and our included 7555878 bushing.

How does this replacement improve steering performance?

Worn upper bushings allow steering shaft play, which leads to vague steering and uneven handling. Installing this new bushing and bracket reduces free play at the steering column, delivering a firmer steering feel and more precise control.

• Reduces column wobble and dead zone at center steering.
• Helps maintain correct steering geometry under load.
• Prevents accelerated wear by restoring correct shaft alignment.

What comes in the package and is installation difficult?

The kit ships with two steering bushings, a mounting bracket, and one 7555878 bushing—everything you need to replace the upper steering bushing assembly. Basic mechanical skills and common tools are usually sufficient; install time typically ranges from 30–90 minutes depending on model and rust/corrosion.

• Included: 2x steering bushings, 1x bracket, 1x 7555878 bushing.
• Tools commonly needed: socket set, screwdrivers, penetrating oil, torque wrench for final fasteners.
• Tip: Compare old parts to included OEM numbers and photos before final assembly.

Are there compatibility or maintenance tips I should know?

Double-check vehicle year, model and steering shaft diameter (1 inch) before ordering. After installation, inspect steering operation and fastener torque after a short first ride to ensure the assembly seats correctly and fasteners remain secure.

• Confirm fit using the listed model years and OEM part numbers (5439731, 5257028).
• Apply light grease to bushing contact surfaces if recommended by your service manual.
• Recheck mounting bolt torque after initial use and periodically thereafter.

Who is this for This MOTO1988 upper steering bushing and bracket set is intended for DIY owners and professional mechanics servicing Polaris ATVs and UTVs who need a direct-fit replacement to restore steering precision. It's a good choice if your vehicle exhibits steering play, uneven steering return-to-center, or if you're performing routine steering maintenance across older model years. If you’re uncertain about fit, compare your existing part numbers to the listing or contact our support for help before ordering.

FAQ

Q: Does this fit my Polaris with a 1-inch steering shaft?

A: Yes — this kit is for Polaris models using a 1-inch steering shaft; confirm by checking your OEM part numbers (5439731, 5257028) and model year list.

Q: Is the installation hardware included?

A: The package includes two bushings, one bracket and the 7555878 bushing; you may need basic hand tools and any original fasteners if they are reusable.