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  3. ATHENA P400485100101

ATHENA P400485100101 Top Big Cylinder End Piston Kit B4X-11311-01-00 58MM 144CC

fits model: Yz125, Yz, 125. make: Yamaha. year: 1925–2022.

P400485100101 Athena 22-25 Yamaha Yz125 Yz 125 58mm 144cc Big Bore Cylinder Top End Piston Kit

( Brand: Athena ), ( Manufacturer Part Number: P400485100101 ), ( Non-domestic Product: No ), ( Machine Type: Off-road Motorcycle ), ( Items Included: Cylinder Barrel, Gasket Set, Piston Rings, Pistons, Wrist Pins ), ( Placement On Vehicle: Upper ), ( Engine Type: 2-stroke ), ( Type: Engine Rebuild Kit ), ( Unit Type: Unit ), ( Ipn: B4x-11311-01-00 ), ( Manufacturer Warranty: 1 Year ), ( Oe/oem Part Number: B4x-11311-01-00, B4x-11111-00-00, B4x-11631-00-d0 ), ( Surface Finish: Silver ), ( Features: Corrosion-resistant, Durable ), ( Country/region Of Manufacture: Italy ), ( Performance Part: Yes )

Review ATHENA Yamaha Big Bore Cylinder Top End Piston Kit fits YZ125 YZ 125 1925–2022

Introducing the Athena P40285100101 22-25 Yamaha YZ125 YZ 125 58mm 144cc Big Cylinder Top End Piston Kit, a high-performance upgrade for your Yamaha YZ125 motorcycle. This top-tier piston kit is meticulously engineered to deliver exceptional power and durability, making it an ideal choice for racers and enthusiasts seeking to enhance the performance of their YZ125.

The Athena piston kit is specifically designed for Yamaha YZ125 models with a 58mm bore and 144cc displacement. Each piston is made from forged aluminum alloy, ensuring superior strength and reliability. The piston features a new, advanced ring package, including a compression ring, oil control ring, and skirt ring, all designed to maximize power output and minimize friction.

The piston kit also includes a new, high-performance piston pin and a set of gudds blocks to ensure a perfect fit and proper clearance. These components are precision-machined from high-strength materials, ensuring a long service life and optimal engine performance.

Additionally, the Athena piston kit comes with a matching, high-compression piston ring set. These rings are designed to work in harmony with the new piston, delivering improved combustion efficiency and increased power output. The kit also includes new piston ring grooves, ensuring a perfect seal and minimizing the risk of blow-by.

Installing the Athena piston kit is a straightforward process, and it is compatible with both stock and aftermarket crankshafts. The kit includes all necessary hardware for a hassle-free installation.

In summary, the Athena P40285100101 22-25 Yamaha YZ125 YZ 125 58mm 144cc Big Cylinder Top End Piston Kit is a top-of-the-line performance upgrade for your Yamaha YZ125. With its forged aluminum piston, advanced ring package, high-performance piston pin, and gudds blocks, this kit delivers increased power output, improved engine reliability, and enhanced durability. Upgrade your YZ125 today and take your riding experience to the next level.

Athena P400485100101 22-25 Yamaha YZ125 YZ 125 58mm 144cc Big Cylinder Top End Piston Kit: A Detailed Analysis

The Athena P400485100101 22-25 Yamaha YZ125 YZ 144cc big cylinder top end piston kit is a popular aftermarket upgrade for the Yamaha YZ125. In this analysis, we will discuss the potential advantages and disadvantages of purchasing this piston kit.

Advantages:

1. Enhanced Performance: The piston kit is designed to increase the engine's power output. It offers a larger displacement of 144cc, resulting in increased horsepower and torque. This can lead to better acceleration and improved overall performance.

2. Durability: The piston kit is made of high-quality materials that are designed to withstand the rigors of off-road racing. It can help extend the life of the engine by reducing wear and tear.

3. Customization: Installing this piston kit allows riders to customize their bikes to their specific needs and preferences. It can give the bike a unique look and feel, making it stand out from other stock models.

Disadvantages:

1. Cost: The piston kit is a more expensive upgrade compared to other aftermarket parts. The cost of this kit may be a significant investment for some riders.

2. Installation Complexity: Installing the piston kit requires a certain level of mechanical expertise. It may not be a suitable upgrade for beginners or those without access to professional mechanics.

3. Compatibility: The piston kit is designed specifically for the Yamaha YZ125. It may not be compatible with other models or years of the bike.

Conclusion:

The Athena P400485100101 22-25 Yamaha YZ125 YZ 144cc big cylinder top end piston kit offers several advantages, including enhanced performance, durability, and customization. However, it also comes with some disadvantages, such as cost, installation complexity, and compatibility. Ultimately, the decision to purchase this kit depends on the rider's budget, mechanical abilities, and specific needs. If the advantages outweigh the disadvantages and the rider is willing to invest in the upgrade, then this piston kit may be a worthwhile investment.

Recommendation:

If you are an experienced rider with a good mechanical background, a budget for the upgrade, and a Yamaha YZ125, then the Athena P400485100101 22-25 Yamaha YZ125 YZ 144cc big cylinder top end piston kit could be an excellent investment for improved performance and durability. If you are unsure about your mechanical abilities, consider consulting a professional mechanic to help with the installation process. Additionally, ensure that the kit is compatible with your specific model and year of the Yamaha YZ125 before making a purchase.

Details:

Fits Yamaha YZ125 2 Stroke Dirt Bikes Years 2022 2023 2024 2025. This kit includes: 58mm 144cc Nasal Athena Big Bore Cylinder. Athena Head Stud Kit. Also Fits Yamaha YZ125X Years 2023 2024 2025.

This is the best and most reliable big bore kit on market. Power Valves Pair. Athena 58mm 144cc Big Bore Cylinder Top End Kit. Athena Complete Top End Gasket Set.

All parts come with warranty.

part #: p400485100101 prices

  • $544.46-$943.15

specifications pistondon:

  • for models: Yz125, Yz, 125
  • for makes: Yamaha
  • for years: 1925-2022
  • brand: Athena
  • mpn: P400485100101
  • non-domestic product: No
  • machine type: Off-road Motorcycle
  • items included: Cylinder Barrel, Gasket Set, Piston Rings, Pistons, Wrist Pins
  • placement on vehicle: Upper
  • engine type: 2-stroke
  • type: Engine Rebuild Kit
  • unit type: Unit
  • ipn: B4x-11311-01-00
  • manufacturer warranty: 1 Year
  • oe/oem part number: B4x-11311-01-00, B4x-11111-00-00, B4x-11631-00-d0
  • surface finish: Silver
  • features: Corrosion-resistant, Durable
  • country/region of manufacture: Italy
  • performance part: Yes

returns pistondon:

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

offer pistondon:

  • options: Ship-to-home
  • sold: 0
  • quantity: 1
  • best offers: True
  • started: April 10, 2025
  • availability: In Stock

shipping pistondon:

  • carrier: FedEx
  • class: Expedited
  • service: FedEx Express Saver
  • transit: 2-5 Days
  • cost: $0.00
  • type: Fixed

seller pistondon:

  • rating: 99.9%
  • # reviews: 30866
  • city: Gilbert, Arizona

general pistondon:

  • condition: New
  • Motorcycle Scooter Parts Accessories > Engines Engine Parts > Engine Rebuild Kits Components

payments pistondon:

  • other
  • credit card: Diners-club
  • wallet: Google-pay
for models: yz125, yz, 125, for makes: yamaha, for years: 1925-2022, non-domestic product: no, machine type: off-road motorcycle, items included: cylinder barrel, gasket set, piston rings, pistons, wrist pins, placement on vehicle: upper, engine type: 2-stroke, type: engine rebuild kit, unit type: unit, manufacturer warranty: 1 year, oe/oem part number: b4x-11311-01-00, b4x-11111-00-00, b4x-11631-00-d0, surface finish: silver, features: corrosion-resistant, durable, country/region of manufacture: italy, performance part: yes,
category: motorcycle parts > motorcycle scooter parts accessories > engines engine parts > engine rebuild kits components, sku: 5679753696691791,

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5 offers $544.46–$943.15 USD
  • Offer #1: $914.18 price + $0.00 shipping estimate = $914.18* total. The intake and exhaust ports are designed for optimal gas flow, and the water jackets are tailored to prevent overheating even during the most demanding sessions. Part Number:.FREE SHIPPING
  • Offer #2: $544.46 price + $0.00 shipping estimate = $544.46* total. Athena Cylinder Bare S410485301030 Yamaha YZ 125 05-25 OEM Part # 1C3-11311-20-00.FREE SHIPPING
  • Offer #3: $943.15 price + $0.00 shipping estimate = $943.15* total. Athena Power Valve. Athena Complete Top End Gasket Set.FREE SHIPPING
  • Offer #4: $926.96 price + $0.00 shipping estimate = $926.96* total. Fits Yamaha YZ125 2 Stroke Dirt BikesYears 2022 2023 2024 2025 2026. Athena 58mm 144cc Big Bore Cylinder Top End Kit! 58mm 144cc Nikasil Athena Big Bore Cylinder.FREE SHIPPING
  • Offer #5: $878.56 price + $0.00 shipping estimate = $878.56* total.FREE SHIPPING

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