1. Pistons, Rings & Piston Kits Products
  2. sku: 9611834419140861
  3. WISECO 515P9

WISECO 515P9 Nos Piston Kit 55.25MM

fits model: Rm125.

515p9 Wiseco Nos Rm125 Piston Kit 55.25mm

( Brand: Wiseco ), ( Manufacturer Part Number: 515P9 ), ( Engine Type: 2-stroke ), ( Type: Piston Kit ), ( Items Included: Piston, Piston Rings ), ( Vintage Part: Yes )

Review WISECO Nos Piston Kit 55.25mm fits RM125

The WISCO 515P9 NOS RM125 Piston Kit is a high-performance upgrade for motorcycle enthusiasts seeking to enhance the power and efficiency of their engines. This piston kit is specifically designed for the Honda RM125 model and features a piston size of 55.25mm, making it an excellent choice for those looking to increase the displacement of their engine.

The pistons in this kit are crafted from forged aluminum alloy, ensuring superior strength and durability. The piston crowns are designed with a dish shape to improve combustion efficiency and power output. Each piston comes with a matching ring set, including a compression ring, oil control ring, and skirt ring, ensuring a proper seal and optimal engine performance.

The piston pins are made from high-strength steel and are chrome molybdenum coated for added durability and reduced friction. The piston kit also includes new piston pin bushings, ensuring a precise and secure fit.

The WISCO 515P9 NOS RM125 Piston Kit is designed to be a direct replacement for the OEM pistons, making the installation process straightforward. The pistons are precision machined to ensure a perfect fit and are finished with a high-quality coating to prevent scuffing during installation.

This piston kit is an excellent choice for riders looking to increase the power and performance of their Honda RM125 motorcycle. It is also an ideal upgrade for those who race their bikes and seek to gain a competitive edge. With its superior strength, improved combustion efficiency, and precision machining, the WISCO 515P9 NOS RM125 Piston Kit is an essential upgrade for any serious motorcycle enthusiast.

The Wiseco 515P9 NOS RM125 piston kit with a squish bore of 55.25mm is a popular choice among Honda CRF450R and CRF450X riders for upgrading their engines. Here are some pros and cons to help you make an informed decision before purchasing this product:

Pros:

1. Enhanced Performance: The piston kit is designed to increase power output and improve overall engine performance.

2. High-quality Material: The pistons are made from forged aluminum, which is stronger and more durable than cast pistons.

3. Improved Ring Life: The kit includes piston rings that are designed to last longer than stock rings.

4. Better Heat Management: The piston kit includes a skirt coating that helps manage engine heat, reducing the risk of detonation and pre-ignition.

5. Increased Compression Ratio: The piston kit offers an increased compression ratio, which can help improve engine efficiency and power output.

Cons:

1. Cost: The Wiseco piston kit is more expensive than stock pistons and rings.

2. Installation Complexity: Installing the piston kit requires specialized tools and knowledge, making it a more time-consuming and labor-intensive process than a standard oil change or air filter replacement.

3. Potential Power Increase: While the piston kit can provide significant power gains, it may also require additional modifications to the engine to ensure safe and reliable operation. For example, you may need to upgrade the exhaust system, fuel system, or ignition system to handle the increased power output.

Conclusion:

The Wiseco 515P9 NOS RM125 piston kit is an excellent choice for riders looking to maximize the performance of their CRF450R or CRF450X. However, it is essential to consider the potential costs and complexities of the installation process before making a purchase. Additionally, it may be necessary to invest in additional modifications to ensure safe and reliable operation. Ultimately, if you are looking for significant power gains and are willing to invest the time and resources into the installation process, the Wiseco piston kit is a worthwhile investment.

Details:

New Old Stock Suzuki RM125 Piston Kit, Does not include wrist pin. Z1 - Kz900 Kz1000 -H1/500 H2/750. NOS Wiseco RM125 Forged Piston Kit 55.25mm, P/N: 515P9. Never shipped until paid in full.

part #: 515p9 price

  • $55.00

specifications pistondon:

  • for models: Rm125
  • brand: Wiseco
  • mpn: 515p9
  • engine type: 2-stroke
  • type: Piston Kit
  • items included: Piston, Piston Rings
  • vintage part: Yes

general pistondon:

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

offer pistondon:

  • availability: In Stock
  • started: December 29, 2025
  • quantity: 1
  • sold: 0
  • options: Ship-to-home
  • best offers: True

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shipping pistondon:

  • service: USPS First Class, USPS Priority Mail, UPS Ground
  • class: Standard, Expedited
  • transit: 4-9 Days
  • carrier: USPS, UPS
  • type: Calculated
  • cost: $11.00

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

seller pistondon:

  • rating: 99.9%
  • city: Wadsworth, Ohio
  • # reviews: 84130
for models: rm125, engine type: 2-stroke, type: piston kit, items included: piston, piston rings, vintage part: yes,
category: motorcycle parts > motorcycle scooter parts accessories > engines engine parts > pistons, rings piston kits, sku: 9611834419140861,

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1 offer $55.00 USD
  • Offer #1: $55.00 price + $12.35 shipping estimate = $67.35* total. K AWASAKI P ARTS NOS Wiseco RM125 Forged Piston Kit 55.25mm.+$12.35 shipping

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