1. Pistons, Rings & Piston Kits Products
  2. sku: 9099901145426771
  3. HARLEY DAVIDSON 16800404

HARLEY-DAVIDSON 16800404 Piston Jug Kit 121-135 4.310 4.625

fits make: Harley.

16800404 Harley-davidson New Genuine 121-135 Piston Jug Kit 4.310 Bore 4.625 Stroke

( Brand: Harley-davidson ), ( Manufacturer Part Number: 16800404 ), ( Type: Piston And Cylinder Kit ), ( Items Included: Piston Rings, Pistons, Jugs ), ( Engine Type: 4-stroke ), ( Piston Diameter: 4.310 ), ( Machine Type: Street Motorcycle, Off-road Motorcycle, Dual Sport Motorcycle ), ( Performance Part: Yes ), ( Harley Davidson M8 135: Harley Cvo 121-135 Stage Iv Jugs Pistons ), ( Jug Color: Cvo Black Granite )

Review HARLEY DAVIDSON New Genuine Piston Jug Kit 4.310 Bore 4.625 Stroke

Harley-Davidson 16800404 121-135 Piston Jug Kit for Select V-Twin Engines

Description:

The Harley-Davidson 16800404 121-135 Piston Jug Kit is a premium replacement solution designed for select V-Twin engines. This kit includes high-performance pistons and piston rings, ensuring optimal engine performance and longevity.

The pistons are meticulously crafted from forged aluminum alloy, providing superior strength and durability. They are designed to fit perfectly into the engine cylinder, ensuring a precise fit and minimizing the chances of engine damage. The piston crowns are optimized for efficient combustion and power transfer, delivering improved engine performance and increased horsepower.

The piston rings in this kit are specifically engineered for a tight seal against the cylinder wall, reducing the possibility of compression loss and ensuring optimal engine efficiency. The rings are made of high-quality materials that can withstand the extreme pressures and temperatures inside the engine cylinder.

This piston jug kit is suitable for various Harley-Davidson V-Twin engines with a piston size range of 4.310 inches to 4.625 inches. It is essential to ensure that the correct kit is selected based on the engine model and size to ensure proper fitment and functionality.

Installation of the Harley-Davidson 16800404 121-135 Piston Jug Kit is a professional job that requires specialized tools and expertise. It is recommended that the installation be carried out by an authorized Harley-Davidson dealer or a qualified mechanic to ensure proper installation and prevent any potential engine damage.

In conclusion, the Harley-Davidson 16800404 121-135 Piston Jug Kit is a high-quality replacement solution for select V-Twin engines. It offers superior strength, durability, and performance, making it an ideal choice for riders who demand the best from their Harley-Davidson motorcycle.

Harley-Davidson 16800404 121-135 Piston Jug Kit: A Detailed Analysis

The Harley-Davidson 16800404 121-135 Piston Jug Kit is a popular aftermarket upgrade for Harley-Davidson engines. This kit includes new pistons, rings, and clips. In this analysis, we will discuss the pros and cons of buying this piston jug kit.

Pros:

1. Improved Engine Performance: The new pistons and rings in this kit can help improve the engine's performance by reducing friction and improving compression. This can lead to increased horsepower, torque, and overall engine efficiency.

2. Enhanced Durability: The pistons in this kit are made of high-quality materials, such as forged aluminum. This makes them more durable than OEM pistons, which can help extend the life of the engine.

3. Customization: This kit allows you to customize your Harley-Davidson engine by upgrading the pistons and rings. This can be especially useful for those who want to increase the performance of their motorcycle or prepare it for high-performance applications.

Cons:

1. Cost: The Harley-Davidson 16800404 121-135 Piston Jug Kit can be quite expensive. The cost of the kit can vary depending on the specific engine application and the source of purchase.

2. Installation Complexity: Installing the pistons and rings in this kit requires a significant amount of skill and expertise. It is recommended that the installation be performed by a professional mechanic to ensure that it is done correctly.

3. Potential for Engine Damage: Installing aftermarket pistons and rings can carry the risk of damaging the engine if not done properly. This is why it is important to use a qualified mechanic for the installation.

Conclusion:

The Harley-Davidson 16800404 121-135 Piston Jug Kit offers several benefits, including improved engine performance, enhanced durability, and customization. However, it also comes with some drawbacks, such as cost, installation complexity, and the potential for engine damage if not installed correctly.

Recommendation:

If you are considering purchasing the Harley-Davidson 16800404 121-135 Piston Jug Kit, it is recommended that you carefully consider the benefits and drawbacks discussed above. It is also important to ensure that the installation is performed by a qualified mechanic to minimize the risk of engine damage. Ultimately, this kit may be a worthwhile investment for those who want to enhance the performance and durability of their Harley-Davidson engine.

Details:

Updated ring package with 1mm compression and scraper rings. Gas-ported to assist with ring sealing while allowing for low-tension and reduced friction. The Screaming Eagle product team has engineered a patent protected 4.31 Big Bore Cylinder that increases the internal bore but slips into existing case without modification. Forged flat-top pistons.

NEW Genuine Harley 121-135 Piston jug Kit 4.310 BORE 4.625 Stroke 16800404:: New - Davidson, Color CVO Black Granite, 135 Jug kit part number 16800404, Part # 16800405 16800404 16800406 21900164 Stroke, Increase the displacement of your Milwaukee-Eight engine without removing from chassis. Piston design and rings engineered to withstand increased combustion forces for outstanding durability. Kit includes front and rear cylinders gaskets. Screaming Eagle products are not available for sale and street legal in all countries.

High-compression pistons are for 4.310 bore 4.652 Stroke. The shipping charges shown cover cost of only. I am sorry if shipping appears expensive, these are the carrier rates. Please look closely at pictures and decide condition fitment for yourself.

part #: 16800404 price

  • $300.00

specifications pistondon:

  • for makes: Harley
  • brand: Harley-davidson
  • mpn: 16800404
  • type: Piston And Cylinder Kit
  • items included: Piston Rings, Pistons, Jugs
  • engine type: 4-stroke
  • piston diameter: 4.310
  • machine type: Street Motorcycle, Off-road Motorcycle, Dual Sport Motorcycle
  • performance part: Yes
  • harley davidson m8 135: Harley Cvo 121-135 Stage Iv Jugs Pistons
  • jug color: Cvo Black Granite

offer pistondon:

  • started: November 28, 2025
  • availability: In Stock
  • sold: 0
  • options: Ship-to-home
  • quantity: 1

general pistondon:

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

returns pistondon:

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

payments pistondon:

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

shipping pistondon:

  • type: Fixed
  • service: UPS Ground
  • carrier: UPS
  • transit: 3-6 Days
  • class: Standard
  • cost: $50.00

seller pistondon:

  • # reviews: 17245
  • rating: 100.0%
  • city: East Peoria, Illinois
for makes: harley, type: piston and cylinder kit, items included: piston rings, pistons, jugs, engine type: 4-stroke, piston diameter: 4.310, machine type: street motorcycle, off-road motorcycle, dual sport motorcycle, performance part: yes, harley davidson m8 135: harley cvo 121-135 stage iv jugs pistons, jug color: cvo black granite,
category: motorcycle parts > motorcycle scooter parts accessories > engines engine parts > pistons, rings piston kits, sku: 9099901145426771,

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