IMPORTANT NOTICE: Piston components/kits are subject to Size AND Fitment Specificity; you NEED TO MEASURE YOUR CYLINDER BEFORE ORDERING. If you use the wrong size piston/piston rings, you will damage your cylinder and we will not be liable. Return will NOT be accepted.

Namura Technologies Piston Rings

Part Number: NA-40015-6R

• Piston Rings are an essential part of piston performance, engine efficiency, and durability.
• Namura piston rings are designed specifically for each application with the best materials and precise fitment.
• Composed of either a highly ductile cast iron or stainless steel alloy.
• Quality provide excellent wear resistance and a gas-tight seal.

Often overlooked and unglamorous, they are an essential part of piston performance, engine efficiency, and durability. The materials used in the manufacturing of piston rings are one of the most critical factors in their performance. The type of cylinder sleeve, sleeve coating, size of the engine, and stroke (2 or 4) all play a role in determining the composition best suited for the operating environment. Compression Rings are composed of either highly ductile cast iron or stainless steel alloy; both materials possess excellent wear resistance and provide a gas-tight seal. Chrome, phosphate, and nitride coatings are also used to meet the demands of the application. Oil rings consist of three separate components. Two scraper rails are constructed from highly ductile cast iron or a stainless steel alloy and also have a chrome, nitride, or phosphate coating. The single expansion ring is manufactured from stainless steel. Namura piston rings are designed specifically for their application with the best materials and precise fitment at unbeatable prices.

Fits:
1992-99 Yamaha YFB250 Timberwolf 2WD
1994-00 Yamaha YFB250 Timberwolf 4WD
1999-04 Yamaha YFM250 Bear Tracker
2005-06 Yamaha YFM250 Bruin
2007-09 Yamaha YFM250 Big Bear

Specs:

• Piston Size (mm): 72.45