PISTON KIT 39.50mm 08-13 POLARIS 50, NAMURA NA-50015-2 ATV QUAD, Polaris 50 OUTLAW 2008-2019, 50 PREDATOR 2007, YAMAHA YFZ50 2017-21
4.1 Trustpilot 99.9% positive on eBay
Delivery to United States 5–8 business days
Spread the cost with 
The Namura piston kit is a standard bore replacement kit featuring a 39.50mm bore and 38.48mm piston diameter. This cast piston kit includes all necessary components for installation: piston, rings, pin, and clips. The piston is manufactured with a high-silicone content for improved strength. The piston dome is anodised for heat resistance, while the Molybdenium Teflon-coated skirts reduce friction and extend service life. Part Number: 56-W837.050.NT. Namura NA-50015-2. Piston Diameter: 38.48 mm. Bore Size: 39.50 mm.
- SKU
- 56-W837.050.NT
- Brand
- Namura Technologies
- Availability
- In Stock (5)
Fitments (13)
| Make | Model | Year |
|---|---|---|
| POLARIS | OUTLAW 50 | 2008 |
| POLARIS | OUTLAW 50 | 2009 |
| POLARIS | OUTLAW 50 | 2010 |
| POLARIS | OUTLAW 50 | 2011 |
| POLARIS | OUTLAW 50 | 2012 |
| POLARIS | OUTLAW 50 | 2013 |
| POLARIS | OUTLAW 50 | 2014 |
| POLARIS | OUTLAW 50 | 2015 |
| POLARIS | OUTLAW 50 | 2016 |
| POLARIS | OUTLAW 50 | 2017 |
| POLARIS | OUTLAW 50 | 2018 |
| POLARIS | OUTLAW 50 | 2019 |
| POLARIS | PREDATOR 50 | 2007 |
- General Product Group
- Engine
- General Product Type
- Pistons & Kits
- General Size
- 50.00mm
- Variant Id
- 257973
FULL DESCRIPTION
Namura Piston Kit 39.50mm Standard Bore
This standard bore replacement piston kit is engineered by Namura for select 50cc Polaris and Yamaha models. It features a 39.50mm bore size and a 38.48mm piston diameter, ensuring a precise fit for optimal performance.
Key Features:
- High-silicone-content cast piston for superior strength and durability.
- Molybdenium Teflon-coated piston skirts reduce friction and significantly extend service life.
- Anodised piston dome enhances heat resistance, crucial for demanding operating conditions.
- Complete kit includes all necessary components for installation: piston, rings, pin, and clips.
- Designed for a standard bore size of 39.50 mm.
- Piston diameter measures 38.48 mm.
- Manufactured by Namura Technologies for quality assurance.
Specifications:
- Bore Size: 39.50 mm
- Piston Diameter: 38.48 mm
QUESTIONS? JUST ASK
Talk to John or Phil. Real people, Monday to Friday, 10:00 to 17:00 (UK time).
Check the fitment table on this page against your make, model and year. Not sure? Call or email us and we will check it for you before you order.
Yes. We ship from the UK. Orders ship within 3 working days, then delivery to the United States takes 5–8 business days. The delivery price is shown at checkout before you pay. Delivery details
Yes. You have 14 days from delivery to return it, unused and in its original packaging. Contact us first and we will send you the return instructions. Returns policy
By card, PayPal, Apple Pay or Google Pay, or spread the cost with Klarna. Payment is taken securely by Stripe, and the options for your order are shown at checkout.
Any customs duties or import taxes charged in the United States are paid by you when the parcel arrives. Any tax we collect ourselves is shown at checkout before you pay.
More answers in our FAQ.
Trade pricing available
Buying parts for your business? Apply for a 2BrosParts trade account.