1. Shocks & Suspension On Sale
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  3. BALLS SCAL-PS778532-LS

BALLS SCAL-PS778532-LS Upper Shaft Jack Bearing Seal Kit All

fits model: Rmk, 550, Trail. make: Polaris. year: 1999–2007.

Scal-ps778532-ls All Balls 1999-2007 Polaris Trail Rmk 550 Upper Shaft Jack Bearing And Seal Kit

( Brand: Balls ), ( Manufacturer Part Number: SCAL-PS778532-LS ), ( Part Type: Bearing Seal Shaft )

Review BALLS All Polaris Upper Shaft Jack Bearing And Seal Kit fits TRAIL RMK 550 1999–2007

The **Balls SCAL-PS778532-LS Upper Shaft Jack Bearing Seal Kit** is a meticulously engineered aftermarket solution designed exclusively for the **1999 2007 Polaris Trail RMK 550**, ensuring optimal performance, longevity, and reliability for this rugged off-road machine. This high-quality kit replaces the factory-installed upper shaft jack bearing and its associated seal, addressing common wear issues that can lead to premature failure, oil leaks, or excessive play in the transmission. Crafted from durable materials, the **SCAL-PS778532-LS** features a precision-machined **steel bearing** with a robust **ball-and-race design**, providing superior load-bearing capacity and smooth operation even under the most demanding off-road conditions. The accompanying **lip-style seal** is engineered from high-grade elastomer compounds, offering excellent resistance to heat, oil, and abrasion while maintaining a tight, consistent seal to prevent contamination and fluid loss. This kit is a direct-fit replacement, eliminating the need for modifications or adjustments, and is ideal for riders seeking to restore factory-like performance or upgrade their Trail RMK 550 s drivetrain for enhanced durability. Whether tackling rough terrain, frequent towing, or heavy-duty trail use, the **Balls SCAL-PS778532-LS** ensures a seamless, leak-free, and long-lasting drivetrain experience, making it an essential upgrade for any serious off-road enthusiast.

### **Pros and Cons of buying a Balls Scal-PS778532-LS Upper Shaft Jack Bearing Seal Kit for 1999-2007 Polaris Trail RMK 550**

#### **Pros:**

1. **Direct Fitment** This kit is specifically designed for the 1999-2007 Polaris Trail RMK 550, ensuring compatibility without modifications. This reduces the risk of improper installation and potential damage to the upper shaft assembly.

2. **High-Quality Materials** Balls Manufacturing is a reputable brand known for producing durable, high-performance seals and bearings. The kit likely includes components that are designed to withstand the stresses of off-road use, reducing the likelihood of premature failure.

3. **Prevents Leaks and Damage** The upper shaft jack bearing and seal are critical components that prevent lubricant leaks and protect the internal mechanisms of the suspension. A failing seal can lead to contamination, increased friction, and eventual suspension failure. Replacing these parts proactively can extend the life of your A-arm and improve ride quality.

4. **Ease of Installation** The kit is likely designed for straightforward installation, especially if you have basic mechanical experience or access to a repair manual. Many aftermarket kits come with clear instructions or even video guides to simplify the process.

5. **Cost-Effective Long-Term Solution** While the upfront cost may seem high, replacing worn seals and bearings is far cheaper than repairing or replacing a damaged A-arm or other suspension components. It s a preventive measure that can save money in the long run.

6. **Improved Performance** A properly functioning upper shaft jack bearing and seal ensure smoother operation of the suspension, reducing vibration and noise while maintaining optimal handling and stability.

7. **Warranty or Return Options** Reputable sellers (such as Balls Manufacturing or authorized dealers) may offer warranties or return policies, providing peace of mind in case of defects or installation issues.

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#### **Cons:**

1. **Upfront Cost** The kit may be more expensive than generic or lower-quality alternatives. However, this cost is often justified by the brand s reputation and longevity of the components.

2. **DIY Installation Challenges** While the kit is designed for ease of use, installing it requires some mechanical skill, patience, and the right tools (e.g., torque wrench, bearing press, and possibly a suspension lift). If you re not comfortable with suspension work, labor costs at a shop may add up.

3. **Potential for Counterfeit or Low-Quality Copies** Purchasing from unauthorized sellers (e.g., third-party marketplaces without brand verification) could result in counterfeit or substandard parts. Always buy from trusted sources like the manufacturer s website, authorized dealers, or well-reviewed retailers.

4. **Limited Availability of Parts** If you re in a remote area, finding the exact kit or additional tools (e.g., a bearing press) might be difficult, requiring special ordering or shipping delays.

5. **Time-Consuming Process** Removing and reinstalling the A-arm, especially if it s rusted or seized, can take several hours. This may not be ideal if you re on a tight schedule or need the bike operational quickly.

6. **Mixed Reviews on Fitment** While the kit is advertised for your specific model, some users report minor fitment issues (e.g., slight clearance gaps or the need for additional lubrication). Always check customer reviews or forums for real-world feedback before purchasing.

7. **Risk of Overlooking Other Issues** During installation, you might discover other worn or damaged components (e.g., bushings, bolts, or the A-arm itself). This could lead to additional unexpected costs if you need to address those issues simultaneously.

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### **Conclusion:**

The **Balls Scal-PS778532-LS Upper Shaft Jack Bearing Seal Kit** is a **highly recommended** purchase for owners of the 1999-2007 Polaris Trail RMK 550 who are experiencing or anticipating suspension issues. The kit offers **direct fitment, durability, and preventive maintenance benefits** that outweigh the cons for most riders. The upfront cost is justified by the potential savings from avoiding costly suspension repairs.

However, the decision depends on your **mechanical comfort level, budget, and access to tools**. If you re not confident in performing the installation yourself, factor in labor costs or consider hiring a professional. Additionally, ensure you purchase from a **trusted source** to avoid counterfeit parts.

For riders who prioritize **long-term reliability and performance**, this kit is a **strong investment**. For those on a tight budget or with minimal mechanical experience, weigh the pros and cons carefully and consider alternatives like a **budget-friendly seal kit** or professional service.

### **Final Recommendation:** **Buy the Balls kit if:**

- You re experiencing leaks, noise, or stiffness in the suspension.

- You have basic mechanical skills or access to a mechanic.

- You value brand reliability and long-term performance.

- You re willing to invest in preventive maintenance to avoid bigger repairs.

**Avoid or reconsider if:**

- You re unsure about installing it yourself and can t afford labor costs.

- You find significantly cheaper alternatives with equally good reviews.

- You re unable to locate the kit from a verified seller.

For most Trail RMK 550 owners, this kit is a **worthwhile upgrade** that enhances suspension life and ride quality.

Details:

I need to exchange an item. Parts without fitment are to be assumed universal and may require vehicle modification. This is helpful if you are buying multiple items. 1999 2007 Polaris Trail RMK 550 Upper Shaft Jack Bearing Seal Kit: Compatibility: Snowmobile, Part Application.

Brand: All Balls, model Number: SCAL-PS778532-LS. Jack shaft and drive kits contain chain case bearing, support seals, o-rings, miscellaneous components as needed.

part #: scalps778532 price

  • $38.50

specifications snowmobileshocksoi:

  • for models: Rmk, 550, Trail
  • for makes: Polaris
  • for years: 1999-2007
  • brand: Balls
  • mpn: Scal-ps778532-ls
  • part type: Bearing Seal Shaft

returns snowmobileshocksoi:

  • time: 30 Days
  • paid by: Seller
  • policy: Returns Accepted

offer snowmobileshocksoi:

  • quantity: 9
  • started: May 19, 2026
  • availability: In Stock
  • sold: 0
  • options: Ship-to-home

seller snowmobileshocksoi:

  • rating: 99.9%
  • # reviews: 85504
  • city: San Marcos, CA

shipping snowmobileshocksoi:

  • transit: 4-9 Days
  • service: Standard
  • type: Fixed
  • class: Standard
  • cost: $0.00

general snowmobileshocksoi:

  • condition: New
  • Parts Accessories > Snowmobile Parts > Shocks Suspension

payments snowmobileshocksoi:

  • credit card: Visa
  • wallet: Google-pay
  • other
for models: rmk, 550, trail, for makes: polaris, for years: 1999-2007, part type: bearing seal shaft,
category: snowmobile parts > shocks suspension, sku: 22427181116943722,
Balls SCAL-PS778532 Is Similar To:
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1 offer $38.50 USD
  • New. Offer #1 priced at $38.50 + $0.00 shipping estimate = $38.50* total. Part Application: Upper Shaft Jack shaft and drive shaft kits contain chain case bearing, support bearing, seals, o-rings, and miscellaneous components as needed.FREE SHIPPING

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