SPI 09-730E Standard Piston 85MM

( Brand: Spi ), ( Manufacturer Part Number: 09-730E ), ( Part Type: Piston ), ( Country Of Origin: Taiwan )

Review SPI Standard Bore Piston Kits Polaris 85mm fits EDGE XC 800 2003–2004

The SPI 09-730E Standard Piston is an essential replacement component for the Polaris XC 800 Edge snowmobiles manufactured in the years 2003 and 2004. This piston, specifically designed for the 85mm bore size, is a critical part of the engine's combustion system.

Manufactured with precision, this piston boasts a forged construction for increased durability and strength. It is engineered to ensure a snug fit within the engine cylinder, minimizing the potential for engine leakage and optimizing the overall engine performance. The piston skirt is designed with a generous crown radius, ensuring proper contact with the cylinder wall, even under high-load conditions.

The SPI 09-730E piston features a precision-machined piston pin bore, ensuring a secure and snug fit for the connecting rod. The piston pin is also included with this kit, making it a complete solution for engine rebuilds or repairs. The piston ring grooves are meticulously machined to accommodate the appropriate piston rings, ensuring a proper seal between the piston and the engine cylinder.

This piston is designed to meet the SPI (Snowmobile Parts, Inc.) 09-730E Standard Specification, ensuring compatibility and interchangeability with other components from reputable manufacturers. By choosing this piston, you can trust that you are getting a high-quality replacement component that will help keep your Polaris XC 800 Edge running at its best.

In summary, the SPI 09-730E Standard Piston is a critical engine component designed specifically for the Polaris XC 800 Edge snowmobiles from 2003 and 2004 with an 85mm bore size. Its forged construction, precision machining, and compatibility with standard specifications make it a reliable and effective solution for engine rebuilds or repairs.

Buying a SPI 09-730E standard piston for a Polaris XC 800 Edge (model years 2003-2004) with an 85mm bore can be a consideration for those looking to improve their snowmobile's performance or address piston-related issues. Here are some potential pros and cons to help in your decision-making process:

1. Improved Performance: A new piston can lead to better combustion efficiency, increased power output, and improved throttle response, resulting in enhanced overall performance for your snowmobile.

2. Durability: A high-quality piston can withstand the rigors of regular use and extreme conditions, potentially extending the life of your engine and reducing the need for frequent repairs.

3. Reduced Engine Noise: A worn or damaged piston can cause excessive engine noise. Replacing it with a new one can help quiet down your snowmobile and provide a more enjoyable riding experience.

4. Maintenance: Regularly replacing pistons is a part of proper snowmobile maintenance, and using a high-performance aftermarket piston like the SPI 09-730E can contribute to the longevity and reliability of your machine.

1. Cost: Aftermarket pistons can be more expensive than OEM (Original Equipment Manufacturer) options. While the performance benefits may be desirable, the added cost could be a deterrent for some riders.

2. Installation: Installing a new piston requires a fair amount of mechanical knowledge and skills. If you're not comfortable doing the work yourself, you may need to pay for professional installation, which could further increase the overall cost.

3. Potential Compatibility Issues: Although the SPI 09-730E is designed for the Polaris XC 800 Edge with an 85mm bore, it's essential to ensure that all other components in your engine are compatible with the new piston. Incorrect installation could lead to engine damage and reduced performance.

In conclusion, the decision to buy a SPI 09-730E standard piston for a Polaris XC 800 Edge (model years 2003-2004) with an 85mm bore depends on your priorities, budget, and mechanical skills. If you value improved performance and durability, and you're willing to invest in a high-quality aftermarket piston and the potential installation costs, then this upgrade could be a worthwhile investment. However, if you're on a tight budget or unsure about your mechanical abilities, it may be wiser to stick with OEM pistons or consider other upgrades that better align with your skillset and financial resources.

Details:

Works in both cast and chrome cylinders. Included is two piston kits pistons, rings, cir clips and wrist pins. Made in Taiwan. Manufactured by SPI.

2004 XC 800 Edge. T-Molly series pistons feature silicone aluminum alloy construction with Teflon and molybdenum coating a hard anodized crown. Compatible with Polaris model's below: 2003 XC 800 Edge. Pistons are for standard bore size 85.00mm.

Manufactured to OEM Specifications.

part #: 09730e prices

• $27.39-$35.15

specifications enginesnowmobile:

• for models: Xc, 800, Edge
• for makes: Polaris
• for years: 2003-2004
• brand: Spi
• mpn: 09-730e
• part type: Piston
• country of origin: Taiwan

seller enginesnowmobile:

• # reviews: 407203
• city: Suamico, Wisconsin
• rating: 99.8%

payments enginesnowmobile:

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

returns enginesnowmobile:

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

general enginesnowmobile:

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

offer enginesnowmobile:

• sold: 0
• options: Ship-to-home
• started: February 21, 2026
• quantity: 2
• availability: In Stock

shipping enginesnowmobile:

• class: Standard
• service: Standard
• cost: $0.00
• type: Fixed
• transit: 4-7 Days

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