PISTON KIT 40.00mm 08-13 POLARIS 50, NAMURA NA-50015-4 ATV QUAD, Polaris 50 OUTLAW 2008-2019, 50 PREDATOR 2007, YAMAHA YFZ50 2017-21

The Namura piston kit with 40.00mm standard bore is designed for Polaris 50cc models and Yamaha YFZ50. This cast piston assembly offers enhanced durability through high silicone content, anodised dome for heat resistance, and Molybdenium Teflon-coated skirts for reduced wear and friction. Supplied as a complete kit, it includes piston, rings, pin, and clips for easy installation and reliable engine performance.

Features

• Manufactured by Namura

• Cast piston with high silicone content for increased strength

• Anodised dome improves heat resistance and lifespan

• Molybdenium Teflon-coated skirts minimise resistance and wear

• Supplied as a complete kit: piston, rings, pin, and clips

• Standard bore size: 40.00 mm

• Piston diameter: 39.98 mm

Specifications

• Bore Size: 40.00 mm

• Piston Diameter: 39.98 mm

• Part Number: 56-W837.100.NT

Cross-Reference OEM Part Numbers

• Namura NA-50015-4

• CLIP-PISTON PIN 0453432

• PISTON-PREDATOR 50 0453833

• PIN-PISTON, PREDATOR 50 0453832

• SET-RING, PISTON, PREDATOR 50 0453834

Vehicle Fitments

• 2007 Polaris Predator 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 Yamaha YFZ50

• 2018 Yamaha YFZ50

• 2019 Yamaha YFZ50

• 2020 Yamaha YFZ50

• 2021 Yamaha YFZ50

Dispatch Times

Local Stock: Dispatches in < 24 hours

Parts showing as available at our Warehouse in Gorey ship the same business day if ordered before 1pm. 

Supplier Stock: Dispatches in 2-4 Days

Parts showing as available at our Supplier Warehouse are ordered from our supplier and delivered to us before we can dispatch. More info is available on this page under "Stock Availability".

OEM Special Order: Dispatches in 3-10 Days

This website does not have access to live stock levels from our OEM Suppliers. In most cases the parts will be available but in the case of backordered parts we will notify you. We receive parts from Yamaha in 3-4 days, All others including Honda, Suzuki, Kawasaki, Polaris please allow 7-10 days for us to receive the parts. 

Delivery Times

Ireland & Northern Ireland:

1-2 Days using GLS/An Post

Germany, France, Netherlands, Belgium:

3-5 Days using GLS/Fedex

Italy, Spain & Other EU Countries:

4-7 Days using GLS/Fedex