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  3. CYCLE 920-0129

S-S CYCLE 920-0129 Piston 4.000 Reviews

fits make: Harley, Davidson.

920-0129 S&s Cycle Harley Davidson 4.000 Inch Piston - New

( Brand: S-s Cycle ), ( Manufacturer Part Number: 920-0129 ), ( Part Type: Piston ), ( Loc: C4-2511 ), ( Items Included: As Seen )

Review S CYCLE Scycle Harley Davidsons4.000 Inch Piston New

Introducing the Harley-Davidson 4.000 piston cylinder head (part number: Cycle 920-0129), a high-performance upgrade for your Harley-Davidson V-Twin engine. This top-tier cylinder head is designed to deliver increased power, torque, and overall engine performance.

The 4.000 piston cylinder head is a direct replacement for the stock cylinder head and is compatible with select Harley-Davidson models. It features four valves per cylinder, each with a diameter of 41mm, that are actuated by a robust roller rocker arm system. This design reduces friction and provides improved valve control for better engine breathing and efficiency.

The cylinder head is constructed from a high-strength aluminum alloy, ensuring lightweight yet robust construction. The combustion chamber shape and size have been optimized for maximum fuel-air mixture and efficient combustion. The cylinder head also includes a revised exhaust port design, which facilitates improved exhaust flow and scavenging.

The 4.000 piston cylinder head comes with an aggressive, high-performance appearance. The cylinder head features a polished finish, which adds a touch of elegance to your engine. The head also includes Harley-Davidson's iconic barrel-chested design, which is instantly recognizable and synonymous with Harley-Davidson performance.

The installation process for this cylinder head is relatively straightforward and can be completed with common hand tools. The cylinder head comes with all necessary hardware, including new head gaskets, to ensure a hassle-free installation. However, it is recommended that this installation be performed by a qualified mechanic to ensure proper installation and to prevent any potential damage to the engine.

In summary, the Harley-Davidson 4.000 piston cylinder head (part number: Cycle 920-0129) is a top-tier performance upgrade for your Harley-Davidson V-Twin engine. It delivers increased power, torque, and overall engine performance, with a robust and elegant design. The installation process is relatively straightforward, but it is recommended that the installation be performed by a qualified mechanic to ensure proper installation and prevent any potential damage to the engine.

The Harley-Davidson 4.0L 920-0129 V-Twin Engine is a high-performance powertrain option for Harley-Davidson motorcycles. Here are some pros and cons to help you make an informed decision about purchasing this engine:

Pros:

1. Increased Power and Torque: The 4.0L engine delivers more power and torque than the standard Harley engines, making it an attractive option for riders who want more performance from their motorcycle.

2. Improved Fuel Economy: Despite the increased power output, the 4.0L engine offers improved fuel economy compared to some other high-performance engines.

3. Smooth and Powerful: The V-Twin design of the engine provides a smooth and powerful riding experience, making it a popular choice among Harley-Davidson riders.

4. Advanced Technology: The engine features advanced technology such as electronic fuel injection, which helps to improve performance and fuel efficiency.

Cons:

1. Higher Cost: The 4.0L engine is more expensive than the standard Harley engines, which may be a deterrent for some riders.

2. Complexity: The engine is more complex than the standard engines, which may require more maintenance and repair work in the future.

3. Limited Availability: The 4.0L engine is not available on all Harley-Davidson models, so riders may need to upgrade their bikes to use it.

4. Weight: The engine is heavier than the standard engines, which may impact the handling and maneuverability of the motorcycle.

In conclusion, the Harley-Davidson 4.0L 920-0129 V-Twin Engine offers increased power and torque, improved fuel economy, and a smooth and powerful riding experience. However, it comes with a higher cost, complexity, limited availability, and added weight. Ultimately, riders who prioritize performance and are willing to invest in a more advanced and expensive engine may find the benefits outweigh the cons.

Recommendation: If you are a Harley-Davidson rider who values performance and is willing to invest in a more advanced engine, the 4.0L engine may be a good option for you. However, if you are on a budget or prioritize simplicity and ease of maintenance, you may want to consider sticking with the standard Harley engines.

Details:

Piston - 920-0129. Harley Davidsons4.000 in. You are buying one piston.

specifications pistondon:

  • for makes: Harley, Davidson
  • brand: S-s Cycle
  • mpn: 920-0129
  • part type: Piston
  • loc: C4-2511
  • items included: As Seen

returns pistondon:

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

payments pistondon:

  • credit card: Visa
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shipping pistondon:

  • type: Fixed
  • class: Standard
  • transit: 5-12 Days
  • carrier: USPS
  • cost: $9.98
  • service: USPS Ground Advantage

offer pistondon:

  • availability: In Stock
  • options: Ship-to-home
  • best offers: True
  • sold: 0
  • quantity: 1
  • started: November 21, 2025

seller pistondon:

  • # reviews: 5008
  • city: Dickson, Tennessee
  • rating: 98.9%

general pistondon:

  • condition: New
  • Motorcycle Scooter Parts Accessories > Engines Engine Parts > Pistons, Rings Piston Kits
for makes: harley, davidson, part type: piston, loc: c4-2511, items included: as seen,
category: motorcycle parts > motorcycle scooter parts accessories > engines engine parts > pistons, rings piston kits, sku: 8981812403490722,

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