1. USED Engine Parts Deals
  2. sku: 13045915186157632
  3. NAMURA MN/J1YA

NAMURA TECHNOLOGIES MN-J1YA Piston Kit Engine MN/J1YA

fits model: Rzr, Xp, 900, Ranger. make: Polaris. year: 2011–2013.

J1ya Namura Technologies Mn/j1ya Piston Kit For 2011-2013 Polaris Ranger Rzr Xp 900 - Engine Pistons Sm

( Brand: Namura Technologies ), ( Manufacturer Part Number: MN/J1YA ), ( Compatible Year: 2013 2012 2011 ), ( Compatible Model: Ranger Rzr Xp 900 ), ( Bundle Description: 1 Pc Genuine Namura Piston Kit ), ( Type: Piston Kit ), ( Core Charge: Free No Core Charge ), ( Fitment Type: Direct Replacement )

Review NAMURA TECHNOLOGIES Mn/j1ya Piston Kit Polaris Engine Pistons Sm fits RANGER RZR XP 900 2011–2013

Introducing the Namura MN/J1YA Piston Kit, specifically designed for the Polaris Ranger RZR XP 900 engine produced between 2011 and 2013. This high-performance piston kit is an excellent upgrade for those seeking improved engine efficiency, durability, and power.

The MN/J1YA pistons are engineered with a forged, compact, and lightweight design. Forged construction ensures the pistons maintain their shape under extreme pressure and heat. With a compact design, these pistons reduce piston-to-wall clearance, allowing for increased compression and power output. Moreover, the lightweight pistons contribute to quicker engine response and smoother operation.

These pistons come with an optimized piston crown design. The crown shape is designed to improve combustion efficiency, ensuring a more complete burn of the fuel mixture. Additionally, the piston skirts are designed to minimize friction, leading to reduced engine wear and improved overall performance.

The Namura MN/J1YA piston kit also includes ring packs. These rings are made of high-quality materials that provide excellent sealing and durability. The kit includes a compression ring, an oil control ring, and a top ring. The compression ring maximizes the compression pressure inside the engine, while the oil control ring prevents oil from leaking past the piston rings. The top ring ensures proper sealing at the top of the piston, preventing combustion gases from escaping.

In summary, the Namura MN/J1YA piston kit is an excellent upgrade for the Polaris Ranger RZR XP 900 engine. The forged pistons offer improved durability and performance, while the optimized piston crown design ensures increased combustion efficiency. The included ring packs provide excellent sealing and durability, contributing to the overall performance and longevity of the engine.

The Namura MN/J1ya piston kit is a popular aftermarket option for the Polaris Ranger RZR XP 900 engine. Here are some pros and cons that may help you make an informed decision about whether to purchase this kit:

Pros:

1. Enhanced Performance: The Namura pistons are designed to provide better compression and increased power output compared to the stock pistons.

2. Durability: The pistons are made from high-quality forged aluminum alloy, which is known for its strength and durability.

3. Cooling: The pistons have an improved cooling design that helps prevent engine overheating, which is important for high-performance use.

4. Longevity: The pistons are expected to last longer than stock pistons, reducing the need for frequent engine rebuilds.

5. Customization: The kit includes two sets of pistons (one for stock bore and one for oversized bore), allowing for customization based on your specific engine modifications.

Cons:

1. Cost: The Namura piston kit is more expensive than the stock pistons.

2. Installation: Installing the new pistons requires some mechanical knowledge and skills, or hiring a professional to do it.

3. Break-In: Properly breaking in the new pistons is crucial for their longevity and optimal performance.

Conclusion:

The Namura MN/J1ya piston kit offers several advantages for the Polaris Ranger RZR XP 900 engine, including enhanced performance, durability, cooling, and longevity. However, it comes with a higher cost, the need for professional installation, and proper break-in. Ultimately, if you're looking to maximize the performance and durability of your Ranger RZR XP 900 engine, the Namura piston kit could be a worthwhile investment. But, if you're on a tight budget or not looking for significant performance gains, the stock pistons may suffice.

part # mnj1ya price

  • $112.60

specifications atvsienna:

  • for models: Rzr, Xp, 900, Ranger
  • for makes: Polaris
  • for years: 2011-2013
  • brand: Namura Technologies
  • manufacturer part number: MN/J1YA
  • compatible year: 2013 2012 2011
  • compatible model: Ranger Rzr Xp 900
  • bundle description: 1 Pc Genuine Namura Piston Kit
  • type: Piston Kit
  • core charge: Free No Core Charge
  • fitment type: Direct Replacement

offer atvsienna:

  • options: Ship-to-home
  • sold: 0
  • availability: In Stock
  • quantity: 1
  • started: April 12, 2026

returns atvsienna:

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

shipping atvsienna:

  • cost: $0.00
  • transit: 4-7 Days
  • service: Standard
  • type: Fixed
  • class: Standard

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seller atvsienna:

  • # reviews: 20892
  • rating: 99.1%

general atvsienna:

  • ATV, Side-by-Side UTV Parts Accessories > Engines Engine Parts > Other Engine Parts
  • condition: New
for models: rzr, xp, 900, ranger, for makes: polaris, for years: 2011-2013, compatible year: 2013 2012 2011, compatible model: ranger rzr xp 900, bundle description: 1 pc genuine namura piston kit, type: piston kit, core charge: free no core charge, fitment type: direct replacement,
category: atv parts > atv, side-by-side utv parts accessories > engines engine parts > engine parts, sku: 13045915186157632,

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