1. Pistons, Rings & Piston Kits Products
  2. sku: 9907991021584983
  3. UNLIMITED 09-728

PARTS UNLIMITED 09-728 Piston Kit Standard 77.25MM

09-728 Parts Unlimited Piston Kit - Standard Bore 77.25mm Snowmobile

( Manufacturer Part Number: 09-728 ), ( Part Type: Piston ), ( Make: Polaris )

Review PARTS UNLIMITED Piston Kit Standard Bore 77.25mm Snowmobile

Introducing the Unlimited 09-728 Piston Kit Standard, an exceptional upgrade for your engine that delivers improved performance and reliability. This piston kit is specifically designed for applications with a bore size of 77.25mm and is a must-have for those seeking superior power output and enhanced durability.

The Unlimited 09-728 Piston Kit Standard is meticulously engineered using high-quality materials, ensuring a perfect fit and superior function. Each piston is crafted from forged aluminum alloy, providing impressive strength and rigidity, while the piston skirts are optimized for reduced friction and superior ring sealing. The pistons also feature a unique, full-dome design that enhances combustion efficiency and maximizes power output.

The piston rings included in this kit are made from premium materials, including top-quality chrome-silicon rings for the compression and oil control grooves, and low-friction, phosphorus-coated rings for the top and second rings. This combination ensures a perfect seal, reduced wear, and minimal oil consumption.

The Unlimited 09-728 Piston Kit Standard also includes new, high-performance piston pins made from heat-treated steel, ensuring maximum strength and durability. The pins are also chrome-molybdenum coated to reduce friction and provide excellent wear resistance.

This piston kit also includes new, high-performance wrist pins, which are also made from heat-treated steel and chrome-molybdenum coated for increased durability and reduced friction. The wrist pins feature a unique, tapered design, which helps to minimize pin bore wear and ensures a perfect fit in the crankshaft.

The Unlimited 09-728 Piston Kit Standard is an excellent choice for those seeking to enhance the performance and reliability of their engine, and is suitable for a wide range of applications. With its superior materials, meticulous engineering, and uncompromising attention to detail, this piston kit is sure to exceed your expectations and provide you with many miles of smooth, powerful, and dependable operation.

Buying an unlimited 09-728 piston kit with a standard 77.25mm stroke has its own set of advantages and disadvantages for those looking to upgrade their engine. Here's a detailed analysis of both:

Advantages:

1. Enhanced Performance: The primary reason for buying an unlimited piston kit is to improve engine performance. The upgraded pistons can help increase horsepower and torque, leading to better acceleration and top-end speed.

2. Durability: High-quality piston kits are designed to withstand the rigors of high-performance driving. They can help increase the lifespan of the engine and reduce the need for frequent repairs.

3. Customizability: An unlimited piston kit allows you to customize the engine to your specific needs. You can choose the exact specifications you want, such as the compression ratio, piston material, and more.

Disadvantages:

1. Cost: An unlimited piston kit can be quite expensive, especially when compared to stock pistons. The cost of the kit itself, as well as the cost of any necessary modifications or upgrades, can add up quickly.

2. Complexity: Installing an unlimited piston kit can be a complex process that requires a high level of expertise. It may involve modifying other engine components, such as the crankshaft or connecting rods, which can add to the cost and complexity.

3. Risk of Engine Damage: There is always a risk of engine damage when making significant modifications. Installing an unlimited piston kit can increase the likelihood of engine damage if not done correctly.

Conclusion:

An unlimited 09-728 piston kit with a standard 77.25mm stroke can offer significant performance gains and increased durability for those looking to upgrade their engine. However, it comes with a high cost, complexity, and risk of engine damage. It is important to weigh these factors carefully and ensure that you have the necessary expertise and resources before making the purchase.

Recommendation:

If you are considering purchasing an unlimited piston kit, it is recommended that you work with a reputable performance shop or engine builder. They can help you determine if this is the right upgrade for your specific vehicle and ensure that the installation is done correctly to minimize the risk of engine damage. Additionally, consider setting a realistic budget and being prepared for any necessary modifications or upgrades that may be required.

Details:

All pistons are priced with ring, wrist pins and cir clips. Any damage claims may be exchanged for the identical item only. High-performance, cast pistons closely match original equipment. Parts Unlimited.

Engineered for the best possible heat transfer from combustion chamber to cylinder walls. Piston Kit - Standard Bore 77.25mm. Sold as: Kit.

part #: 09728 prices

  • $52.99-$59.99

specifications pistondon:

  • mpn: 09-728
  • part type: Piston
  • make: Polaris

seller pistondon:

  • rating: 99.5%
  • # reviews: 610283
  • city: Loudon, Tennessee

shipping pistondon:

  • class: Economy, Standard, Expedited
  • transit: 4-11 Days
  • cost: $0.00
  • service: Economy, Standard, Expedited
  • type: Fixed

returns pistondon:

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

offer pistondon:

  • options: Ship-to-home
  • started: January 12, 2026
  • availability: In Stock
  • sold: 0

payments pistondon:

  • other
  • wallet: Apple-pay
  • credit card: Discover

general pistondon:

  • Motorcycle Scooter Parts Accessories > Engines Engine Parts > Pistons, Rings Piston Kits
  • condition: New
part type: piston,
manufacturer: polaris, category: motorcycle parts > motorcycle scooter parts accessories > engines engine parts > pistons, rings piston kits, sku: 9907991021584983,

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5 offers $52.99–$59.99 USD
  • Offer #1: $52.99 price + $0.00 shipping estimate = $52.99* total. 2005 Polaris XC SP 600. Parts Unlimited Piston Kit Standard Bore 77.25mm.FREE SHIPPING
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  • Offer #3: $59.34 price + $0.00 shipping estimate = $59.34* total. BORE SIZE 277,25 Mm. Piston Kit.FREE SHIPPING
  • Offer #4: $52.99 price + $0.00 shipping estimate = $52.99* total. Parts Gear Change Cable for 1985-1987 Honda ATC250SX ATV TRX250 FourTrax. Parts Unlimited Piston Kit.FREE SHIPPING
  • Offer #5: $220.00 price + $0.00 shipping estimate = $220.00* total. 2000 Polaris 600 XC SP Edge. 2002 Polaris 600 RMK 136.FREE SHIPPING

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