SPI POL550FTERK73993 Top Pistons End Gasket Kit Bearings 73MM

( Brand: Spi ), ( Manufacturer Part Number: POL550FTERK73993 ), ( Part Type: Gasket Bearing Piston ), ( Piston Type: Cast, Dual Ring ), ( Piston Size: For Standard Bore 73mm ), ( Country/region Of Manufacture: Taiwan ), ( Piston Surface Finish: Has Teflon Skirt Coating )

Review SPI Polaris Pistons Top End Gasket Kit Bearings 73mm fits TRAIL RMK STD 550 1999–2010

Introducing the SPI Pol550FTERK73993 top end gasket kit for the Polaris Trail RMK 550 snowmobiles manufactured between 1999 and 2010. This comprehensive kit is designed to provide you with all the necessary components for a successful top end rebuild.

The heart of this kit is the set of seven high-performance pistons, each specifically engineered to deliver optimal power and efficiency for your Polaris Trail RMK 550. These pistons are precision-machined from a strong, lightweight material to ensure superior durability and reliability.

The kit also includes a complete set of gaskets, meticulously engineered to ensure a perfect seal between engine components. These gaskets are designed to withstand the rigors of snowmobiling, providing a reliable and long-lasting seal that will keep your engine running at its best.

Moreover, the SPI Pol550FTERK73993 kit comes with standard-sized bearings with a diameter of 73mm. These bearings are manufactured to the highest standards to ensure smooth and reliable operation, reducing friction and wear on other engine components.

This kit is a perfect match for your Polaris Trail RMK 550, ensuring a hassle-free installation process. The pistons and bearings are designed to work seamlessly with your existing engine components, allowing you to get back on the trail as soon as possible.

In summary, the SPI Pol550FTERK73993 top end gasket kit is an essential investment for any Polaris Trail RMK 550 owner looking to keep their snowmobile in top condition. This complete kit includes seven high-performance pistons, a set of gaskets, and standard-sized bearings, all designed to deliver optimal power, efficiency, and reliability for your snowmobile.

Buying a top end gasket kit, pistons, bearings, and standard 73mm pistons for a Polaris Trail RMK 550 (model years 1999-2010), specifically the SPI Pol550FTERK73993 kit, comes with both advantages and disadvantages. Here's an analysis of each:

1. Wear and Tear: Replacing the pistons, gaskets, and bearings is essential for maintaining the engine's health. Worn parts can lead to decreased performance, increased fuel consumption, and even engine failure.

2. Performance Enhancement: A fresh top end can lead to improved engine performance and power output.

3. Preventing Future Issues: By addressing these potential issues now, you can prevent future problems and costlier repairs.

1. Cost: The SPI Pol550FTERK73993 kit is a significant investment. It includes new pistons, gaskets, bearings, and the labor cost if you choose to have it installed professionally.

2. Time: If you choose to install the kit yourself, it's a time-consuming process that requires a fair amount of mechanical knowledge and skill.

3. Potential for OEM Compatibility Issues: After-market parts may not fit perfectly, leading to potential compatibility issues.

In conclusion, investing in the SPI Pol550FTERK73993 top end gasket kit, pistons, bearings, and standard 73mm pistons for a Polaris Trail RMK 550 is a necessary expense for maintaining the engine's performance and longevity. While it comes with a cost and time commitment, the advantages of improved performance, preventing future issues, and the peace of mind that comes with a fresh top end outweigh the disadvantages.

If you are experiencing engine performance issues, have high mileage on your Polaris Trail RMK 550, or simply want to ensure your sled is in top shape, it's recommended that you invest in the SPI Pol550FTERK73993 top end gasket kit, pistons, bearings, and standard 73mm pistons. If you're not comfortable with the installation process, consider having it done by a professional mechanic to ensure a proper fit and function.

Details:

Brand New Top End Engine Rebuild Kit. Pistons are for the standard bore 73mm. Top end gasket kit includes all gaskets pictured. Anodized piston dome for increased protection against excessive heat.

Fits: 1999 2010 Polaris Indy Trail RMK 550 Fan-Cooled. Made from hyper eutectic alloy for extra strength and reduced expansion. High-quality cast piston made with excellent materials to precise specifications. MOS2 Teflon/Molybdenum coated skirts perform at the highest standards, reducing friction and heat for added power longevity.

Includes 2 SPI pistons, rings, wrist pins, cir clips, pin bearings, and a top end gasket kit.

part #: pol550fterk73993 prices

• $184.99-$199.99

specifications enginesnowmobile:

• for models: Rmk, Std, 550, Trail
• for makes: Polaris
• for years: 1999-2010
• brand: Spi
• mpn: Pol550fterk73993
• part type: Gasket Bearing Piston
• piston type: Cast, Dual Ring
• piston size: For Standard Bore 73mm
• country/region of manufacture: Taiwan
• piston surface finish: Has Teflon Skirt Coating

shipping enginesnowmobile:

• carrier: USPS
• type: Fixed
• cost: $0.00
• service: USPS Ground Advantage, USPS Priority Mail, USPS Priority Mail Express
• transit: 4-10 Days
• class: Standard, Expedited

offer enginesnowmobile:

• options: Ship-to-home
• availability: In Stock
• started: June 27, 2025
• sold: 0
• quantity: 7

payments enginesnowmobile:

• wallet: Apple-pay
• credit card: Diners-club
• other

general enginesnowmobile:

• condition: New
• Snowmobile Parts > Engines Components > Snowmobile Engine Components

seller enginesnowmobile:

• # reviews: 90043
• rating: 98.5%
• city: Interlochen, Michigan

returns enginesnowmobile:

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

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