SPI POL850SPTERK85DR2 Top Dual Ring Pistons End Rebuild

( Brand: Spi ), ( Manufacturer Part Number: POL850SPTERK85DR2 ), ( Part Type: Ring Piston ), ( Piston Type: Cast, Dual Ring ), ( Pistons Replace Oem: 2209886, 2207820, 2208205 ), ( Vehicle Type: Snowmobile ), ( Piston Size: For Standard Bore 85mm ), ( Country/region Of Manufacture: Taiwan ), ( Piston Surface Finish: Has Teflon Skirt Coating )

Review SPI Polaris Dual Ring Pistons Top End Rebuild fits SWITCHBACK ASSAULT 850 2020–2021

The SPI PolarIS Switchback Assault 850, manufactured by Polaris Industries, is an advanced top end rebuild kit designed specifically for the Polaris 850cc twin-cylinder engine found in select snowmobiles from the 2020 and 2021 model years. This kit, part number SPIPOL850SPTERK85DR2, includes dual ring pistons engineered to deliver enhanced performance and reliability.

The pistons are precisely machined from a high-strength forged aluminum alloy, ensuring superior durability and heat resistance. The piston skirts are treated with a state-of-the-art coating to minimize friction and wear, promoting longer engine life and improved efficiency. The piston rings are designed with a dual ring configuration, ensuring optimal sealing and piston-to-bore contact for maximum power transfer.

This kit also includes new piston pins, wrist pins, and rings, ensuring a complete top end rebuild. The piston pins are made from chrome-molybdenum alloy for superior strength and durability, while the wrist pins are made from high-strength steel. The piston rings are engineered from a nitrided steel alloy, ensuring excellent sealing properties and resistance to wear.

Additionally, this kit comes with new gaskets and seals, ensuring a perfect seal between components and preventing oil leaks. The gaskets are made from a high-performance material that can withstand the extreme temperatures and pressures found in a snowmobile engine.

The SPI PolarIS Switchback Assault 850 top end rebuild kit is designed to be a direct replacement for the OEM components, making installation straightforward and hassle-free. It is recommended that this kit be installed by a qualified technician to ensure proper installation and maximize the performance benefits.

In summary, this SPI PolarIS Switchback Assault 850 top end rebuild kit, SPIPOL850SPTERK85DR2, offers a complete solution for upgrading the performance and reliability of your Polaris 850cc twin-cylinder engine. With its high-strength materials, advanced design, and complete kit contents, this rebuild kit is an excellent investment for any snowmobiling enthusiast seeking improved power, efficiency, and engine longevity.

Pros and Cons of Buying a SPI Polaris Switchback Assault 850 Dual Ring Pistons Top End Rebuild Kit (2020-2021)

The SPI Polaris Switchback Assault 850 Dual Ring Pistons Top End Rebuild Kit is a popular upgrade for Polaris Snowmobiles. This kit includes new pistons, rings, and other related components. In this article, we will discuss the pros and cons of investing in this rebuild kit for your Polaris snowmobile.

1. Improved Performance: The dual ring pistons offer better sealing, which can lead to improved combustion efficiency and increased power output.

2. Enhanced Durability: The rebuild kit includes new pistons and rings, which can help extend the life of your engine and prevent costly repairs down the line.

3. Better Fuel Efficiency: Improved combustion efficiency can lead to better fuel economy, saving you money on fuel costs over time.

4. Smoother Engine Operation: The new components can help reduce engine noise and vibration, leading to a smoother riding experience.

5. Compatibility: The SPI kit is specifically designed for Polaris Switchback Assault 850 models from 2020 to 2021, ensuring a perfect fit.

1. Cost: The SPI Polaris Switchback Assault 850 Dual Ring Pistons Top End Rebuild Kit can be expensive compared to other aftermarket parts.

2. Installation Complexity: Installing the kit requires advanced mechanical skills and tools, which may be a challenge for some users.

3. Potential Power Loss: Some users have reported a slight power loss after installing the new pistons, but this is typically offset by the improved efficiency and durability.

The SPI Polaris Switchback Assault 850 Dual Ring Pistons Top End Rebuild Kit is an excellent investment for Polaris Snowmobile owners who want to improve their engine's performance, durability, and fuel efficiency. While the cost and installation complexity may be a deterrent for some, the long-term benefits are significant. We recommend this kit for those who are comfortable with advanced engine work or who are willing to pay for professional installation.

If you're not comfortable with the installation process, we recommend consulting a professional snowmobile mechanic to ensure a proper installation. Alternatively, consider purchasing the kit from a reputable dealer or retailer with excellent customer service and installation support. This will help mitigate any potential issues and ensure that you get the most out of your investment.

Details:

Top end gasket kit includes all gaskets and seals pictured. Made from hyper eutectic alloy for extra strength and reduced expansion. Pistons are for the standard bore 85mm. Anodized piston dome for increased protection against excessive heat.

MOS2 Teflon/Molybdenum coated skirts perform at the highest standards, reducing friction and heat for added power longevity. High-quality cast piston made with excellent materials to precise specifications. Includes 2 SPI Dual Ring Pistons, rings, wrist pins, cir clips, pin bearings, and a top end gasket kit. Brand New Top End Engine Rebuild Kit.

specifications enginesnowmobile:

• for models: 850, Switchback, Assault
• for makes: Polaris
• for years: 2020-2021
• brand: Spi
• mpn: Pol850spterk85dr2
• part type: Ring Piston
• piston type: Cast, Dual Ring
• pistons replace oem: 2209886, 2207820, 2208205
• vehicle type: Snowmobile
• piston size: For Standard Bore 85mm
• country/region of manufacture: Taiwan
• piston surface finish: Has Teflon Skirt Coating

returns enginesnowmobile:

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

general enginesnowmobile:

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

shipping enginesnowmobile:

• class: Standard, Expedited
• type: Fixed
• transit: 4-7 Days
• service: USPS Ground Advantage, USPS Priority Mail, USPS Priority Mail Express
• carrier: USPS
• cost: $0.00

payments enginesnowmobile:

• wallet: Paypal
• credit card: Discover
• other

seller enginesnowmobile:

• rating: 98.9%
• # reviews: 89800
• city: Interlochen, Michigan

offer enginesnowmobile:

• sold: 0
• availability: In Stock
• options: Ship-to-home
• quantity: 4
• started: March 2, 2025

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