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Middle Axle Brake Assembly Big Boss 4x6

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1991 polaris big-boss-4x6-w918627
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Quick answer: The Middle Axle Brake Assembly Big Boss 4x6 for the 1991 1991 polaris big-boss-4x6-w918627 (ATV) consists of 13 OEM components. 7 are currently matched to live Amazon/eBay listings, priced from $1.99–$17.00.
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Showing 13 Components
SCREW,BLEEDER

The Polaris Big Boss Sportsman Magnum Bleeder Screw (Part #7080352) is an original equipment manufacturer (OEM) component designed for precise fluid drainage applications in Polaris off-road vehicles. Engineered to meet exacting specifications, this screw ensures reliable performance and compatibility with Polaris Big Boss Sportsman Magnum models.

Constructed from durable materials, this bleeder screw is a critical component for maintaining optimal engine and cooling system efficiency. It is specifically manufactured to Polaris standards, guaranteeing seamless integration and long-term functionality. Ideal for maintenance, repairs, or upgrades, this OEM replacement screw delivers the reliability expected from genuine Polaris parts.

eBay Motors Stock Available

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Buy on eBay ($1.99)
SETSCREW,SKT.HD.(10)

Polaris Socket Set Screw 7515489 offers a precision-engineered solution for high-performance fastening applications. Constructed with premium alloy steel, the set screw delivers reliable torque retention and corrosion resistance suitable for demanding operational environments.

Designed for seamless integration, the socket set screw features a standardized hex head and a hardened tip that ensures secure engagement with threaded components. The product’s robust construction supports consistent performance under repeated load cycles, making it an ideal choice for industrial and automotive assemblies requiring dependable fastening integrity.

eBay Motors Stock Available

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PISTON & SEAL,KIT (Incl. 4 7)

The **OEM-compatible caliper piston set** is engineered for direct replacement on Polaris models requiring part numbers **1930641, 1930665, or 5020506**. Manufactured to exacting specifications, this precision-machined component ensures optimal brake performance, seamless installation, and extended durability.

Designed for front, rear, or middle caliper applications, this piston set delivers consistent friction modulation and reliable stopping power. Compatible with Polaris ATVs, UTVs, and snowmobiles, it adheres to original equipment standards for material composition and dimensional accuracy.

eBay Motors Stock Available

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KIT BOOT,FRONT BRAKE

The Polaris Brake Boot Kit 1930642 T373 provides a complete replacement solution for brake system maintenance. Engineered to meet original equipment standards, this kit includes all necessary components to ensure reliable braking performance and durability.

Designed for straightforward installation, the kit integrates seamlessly with existing brake assemblies, offering precise fit and function. It is suitable for a range of Polaris models requiring this specific part number.

eBay Motors Stock Available

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SCREW, CAP(10)

**Authentic OEM Polaris 7512365 Hex Cap Screw** – Precision-engineered for direct application in Polaris equipment. This high-quality, two-piece assembly delivers reliable performance with a **hex head design** and **fully threaded shank**, ensuring secure fastening in critical applications. Compatible with Polaris vehicles and machinery requiring **M8 x 1.25 x 25mm** fasteners.

**Key Features:** - **Material:** Carbon steel (grade 8.8) - **Thread Type:** Metric (M8 x 1.25) - **Length:** 25mm - **Head Type:** Hex cap - **Quantity:** 2 (NOS – New Old Stock) - **Surface Treatment:** Zinc-plated (corrosion-resistant) Ideal for maintenance, repairs, or original equipment replacement. Meets Polaris specifications for durability and compatibility.

eBay Motors Stock Available

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Amazon Listing
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The **Quad Logic Polaris ATV/UTV flat washer (6-pack)** provides a direct replacement for original equipment part number **7558402**. Engineered to exacting standards, these **silver-colored, side-by-side washers** ensure precise fitment and reliable performance across compatible Polaris models.

Each washer is rigorously tested for quality and compatibility prior to listing. This **6-count pack** includes **flat washers** with a **fastener type** designed for Polaris ATV and UTV applications. **Item weight: 3 oz.**; **part number: 100-1091-6**. Compatibility may extend to multiple model years—verify fitment details before purchase. Returns subject to a **15% restocking fee**.

  • 0: Polaris ATV / UTV Washers
  • 1: Sold as 6 Pack
  • 2: Replaces Polaris Part Number 7558402
  • 3: Please Read Full Product Description Below To Check Fitment.
  • 4: Brand New Replacement Hardware From Quad Logic
View on Amazon ($8.95) →
eBay Listing
eBay listing photo

The **Polaris 7558402 Flat Washer** represents genuine OEM quality, engineered for precise fitment and durability in Polaris equipment. This **3-pack** ensures ready availability for maintenance, repairs, or replacements, adhering to original manufacturer specifications.

Constructed from high-grade material, this flat washer delivers consistent performance under operational loads. Compatible with Polaris systems requiring exacting dimensional standards, it minimizes wear and extends component longevity. Ideal for professional technicians and DIY enthusiasts seeking authentic replacement parts.

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LOCK WASHER(10)

The **Polaris 7552901 OEM Spring Lock Washer** is a precision-engineered component designed for compatibility with the **2000 Polaris Sport Lite 440 F/C** models. Crafted to exacting specifications, this washer ensures secure fastening and vibration resistance in critical applications, maintaining optimal performance under operational stress.

Constructed from high-quality materials, this spring lock washer delivers reliable torque retention and prevents loosening over time. Direct replacement for factory parts, it adheres to original equipment manufacturer (OEM) standards for seamless integration and long-term durability. Ideal for maintenance professionals and enthusiasts seeking authentic, high-performance components.

eBay Motors Stock Available

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Buy on eBay ($2.95)
Exact factory OEM # 1930663 may be temporarily out of stock in official store listings.
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Exact factory OEM # 1930664 may be temporarily out of stock in official store listings.
High Demand Part
Search Aftermarket / Compatible Fits

Looking for a direct-fit replacement from a compatible aftermarket brand?

Browse Amazon Compatible Parts →
Search Live Auctions & Used OEM Stock

Find New-Old-Stock (NOS), open-box deals, or verified salvage teardown parts.

Search Live Listings on eBay →
Exact factory OEM # 1930643 may be temporarily out of stock in official store listings.
High Demand Part
Search Aftermarket / Compatible Fits

Looking for a direct-fit replacement from a compatible aftermarket brand?

Browse Amazon Compatible Parts →
Search Live Auctions & Used OEM Stock

Find New-Old-Stock (NOS), open-box deals, or verified salvage teardown parts.

Search Live Listings on eBay →

Middle Axle Brake Assembly Big Boss 4x6 — Frequently Asked Questions

What OEM parts are included in the Middle Axle Brake Assembly Big Boss 4x6 for the 1991 polaris big-boss-4x6-w918627?

The Middle Axle Brake Assembly Big Boss 4x6 for the 1991 polaris big-boss-4x6-w918627 includes 13 individual OEM components, each listed below with its exact OEM part number.

How much does the Middle Axle Brake Assembly Big Boss 4x6 cost for the 1991 polaris big-boss-4x6-w918627?

Individual components in this assembly currently range from $1.99–$17.00, based on live Amazon and eBay listings. See the price comparison below for each part.

Will these OEM parts fit other 1991 polaris big-boss-4x6-w918627 model years or trims?

Manufacturers frequently reuse the same physical part across multiple model years and trims, so a given OEM part number can be compatible with more than just this exact vehicle — search the OEM number directly to see every vehicle it fits.

What is the OEM part number for SCREW,BLEEDER on the 1991 polaris big-boss-4x6-w918627?

The OEM part number for the SCREW,BLEEDER (part of the Middle Axle Brake Assembly Big Boss 4x6 assembly) on the 1991 polaris big-boss-4x6-w918627 is 7080352.

Does OEM part 7080352 fit the 1991 polaris big-boss-4x6-w918627?

Yes — OEM 7080352 is listed as the SCREW,BLEEDER for the 1991 polaris big-boss-4x6-w918627 (1991), part of the Middle Axle Brake Assembly Big Boss 4x6 assembly.

Which parts are included in the Middle Axle Brake Assembly Big Boss 4x6?

SCREW,BLEEDER, SETSCREW,SKT.HD.(10), PISTON & SEAL,KIT (Incl. 4 7), KIT BOOT,FRONT BRAKE, SCREW, CAP(10), WASHER STEEL(10), LOCK WASHER(10), CALIPER ASSEMBLY,LEFT HAND(MID AXLE) (Complete), and 5 more — see the full list below.

What other vehicles use OEM part number 7080352?

OEM 7080352 (SCREW,BLEEDER) also fits 773 other vehicles in this catalog, including 1990 polaris trail-blazer-w907221 — Front Brake Assembly, 1990 polaris trail-blazer-w907221 — Rear Brake Assembly, 1990 polaris trail-boss-4x4-w908127 — Front Brake Assembly.

Cross-Marketplace Price Tracker
Compare total assembly price across Amazon Prime vs. eBay Certified Sellers.
Amazon Est. Total
$8.95
eBay Est. Total
$61.90