Skip to product information
1 of 1


Yamaha YZ85 2019-2021 Namura Performance Top End Piston Kit

Regular price $89.45 USD
Regular price $109.95 USD Sale price $89.45 USD
Sale Sold out

Namura and Yamaha YZ85 2019-2021 top-end rebuild will help to bring back the performance of your YZ85. 

Most manufacturers recommend on small-bore motocross engines need to have the piston and rings replaced every 25-30 hours to maintain peak performance and not damage the cylinder plating. Namura uses a MOS2 (Teflon/Molybdenum) coated piston skirt which is a rolled-on process that bonds 10x stronger than sprayed on coatings and provides a bond that is 10x stronger than another spray type on coatings. This offers greater heat transfer and reduces friction to help to eliminate cold seizures. The head of the piston is machined smooth to reflect combustion temperatures away from the piston. Some tests have shown this feature can increase horsepower and fuel economy by up to 6% in gains. Namura Kit for your YZ85 gives you everything you need to service your top-end in one box in top keeping it running in peak condition.


Features Namura Top-End Rebuild Kit Yamaha YZ85 2019-2021:

  • Namura piston kits for your YZ85 come with the piston individually wrapped; a set of OEM quality rings packed in their own box, a wrist pin, and circlips.
  • MOS2 (Teflon/Molybdenum) Coated Piston Skirts better than a rolled-on application process provide a bond that is ten times stronger than another spray-on coatings.

  • Machined Smooth Piston Heads - Reflects combustion heat and reduces carbon buildup, protecting the top of the piston. 

  • Anodized Piston Domes Increases - heat resistance and durability; pistons with anodized domes are 75% stronger than non-anodized pistons.
  • The casting Process Provides higher silicon content for reduced expansion rates and additional wear resistance; it also has the ability to withstand higher cylinder temperatures.
  • Fits the Yamaha YZ85 2019-2021
Click to see all the other performance parts for your Yamaha YZ85

    Moto-House MX - Choice of Champions - Located in the Clermont/Groveland Fl area where Motocross lives day in and out, many of the top riders in the world train. We live Motocross.


    Shipping & Returns


    Care Instructions