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  3. HARLEY DAVIDSON 91-7089-S

HARLEY DAVIDSON Cylinder Forged Piston Kit 1/8 91-7089-SS

fits make: Harley.

91-7089-s Harley Davidson S&s Cylinder 4 1/8 Bore Forged Piston Kit

( Brand: Harley Davidson ), ( Manufacturer Part Number: 91-7089-S ), ( Type: Cylinders ), ( Manufacturer Warranty: 60 Days ), ( Vehicle Type: Motorcycle ), ( Country Of Origin: United States )

Review HARLEY DAVIDSON 91-7089-sscylinder 1/8 Bore Forged Piston Kit

Harley-Davidson 91-7089-SS Forged Cylinder 1/8 Piston Kit

Description:

Introducing the Harley-Davidson 91-7089-SS Forged Cylinder 1/8 Piston Kit, a high-performance upgrade for your Harley-Davidson motorcycle. This kit includes not one, but eight forged pistons, each carefully crafted to deliver superior strength and durability.

The 91-7089-SS pistons are forged from a single piece of high-tensile aluminum alloy, ensuring a strong and uniform structure. This results in pistons that can withstand the rigors of high-performance riding, providing improved power and torque output.

Additionally, these forged pistons feature a precise, polished finish that not only enhances their visual appeal but also helps reduce friction and heat, ensuring smooth and efficient engine operation. The piston skirts have been optimized for a perfect fit in the cylinder bore, reducing the potential for piston-to-wall contact and minimizing the risk of scuffing or scoring.

This Harley-Davidson 1/8 piston kit is designed specifically for the 45 V-Twin engines found in various Harley-Davidson models, including Softail, Dyna, and Touring series motorcycles. By upgrading to these forged pistons, you can expect improved engine performance, increased horsepower, and enhanced reliability for your Harley-Davidson.

Installation of the 91-7089-SS Forged Cylinder 1/8 Piston Kit is straightforward, with no major engine disassembly required. However, it is always recommended to have the installation performed by a professional mechanic to ensure proper fitment and alignment.

In summary, the Harley-Davidson 91-7089-SS Forged Cylinder 1/8 Piston Kit is an excellent choice for riders seeking to enhance the power and durability of their Harley-Davidson motorcycle. With forged pistons designed for superior strength and efficiency, a precise fitment, and straightforward installation, this kit is an investment in the long-term performance and enjoyment of your Harley-Davidson.

Pros and Cons of Buying a 91-7089-SS Forged Piston Kit for Harley-Davidson

Introduction:

The 91-7089-SS forged piston kit is a popular upgrade option for Harley-Davidson motorcycles. This kit, which includes forged pistons and other necessary components, offers several benefits for performance and durability. In this article, we will discuss the pros and cons of purchasing this kit, followed by a concluding recommendation.

Pros:

1. Enhanced Performance: Forged pistons provide better strength and durability than stock pistons, leading to increased power and torque. This results in improved engine performance and a more enjoyable riding experience.

2. Heat Resistance: Forged pistons are better at handling high temperatures than their cast counterparts. This makes them suitable for high-performance applications and extended riding hours, particularly in hot climates.

3. Lightweight: Forged pistons are typically lighter than cast pistons due to their manufacturing process. This reduction in weight can lead to better engine response and improved fuel efficiency.

Cons:

1. Cost: Forged piston kits like the 91-7089-SS can be quite expensive compared to stock pistons. This may be a deterrent for some riders, especially those on a tight budget.

2. Complex Installation: Installing forged pistons requires specialized tools and knowledge. This can make the installation process more time-consuming and potentially expensive if not done correctly.

3. Potential Engine Disassembly: In some cases, the installation of forged pistons may require the engine to be completely disassembled. This can be a significant undertaking and may add to the overall cost and complexity of the project.

Conclusion:

The 91-7089-SS forged piston kit offers several benefits, including enhanced performance, heat resistance, and lightweight construction. However, it also comes with some drawbacks, such as cost, complex installation, and potential engine disassembly. Ultimately, the decision to purchase this kit depends on the rider's priorities, budget, and technical expertise. If performance and durability are top priorities, and the rider has the necessary resources and expertise, the 91-7089-SS forged piston kit could be an excellent investment. On the other hand, if budget is a concern or the rider is not comfortable with the installation process, a stock piston upgrade or another performance modification may be a more suitable option.

Details:

Removed from a V111sengine with 5k miles. No broken or bent fins. Needs honing. Natural finish.

part #: 917089 price

  • $899.99

specifications pistondon:

  • for makes: Harley
  • brand: Harley Davidson
  • mpn: 91-7089-s
  • type: Cylinders
  • manufacturer warranty: 60 Days
  • vehicle type: Motorcycle
  • country of origin: United States

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  • quantity: 1
  • started: April 25, 2026

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general pistondon:

  • Motorcycle Scooter Parts Accessories > Engines Engine Parts > Pistons, Rings Piston Kits
  • condition: Used

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  • # reviews: 891
for makes: harley, type: cylinders, manufacturer warranty: 60 days, vehicle type: motorcycle, country of origin: united states,
category: motorcycle parts > motorcycle scooter parts accessories > engines engine parts > pistons, rings piston kits, sku: 12016546329161711,

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