BikeMaster BMXR Series X-Ring Chain - 525 x 25 Feet - Natural 2003 Yamaha YZ125 Each hidden breather is o-ringed

Each hidden breather is o-ringed at the heads and exits at the mouth of the injector/ carb to provide efficient engine breathing and a virtually closed loop system

2008 Yamaha FX Nytro

2010 KTM 300 XC

Namura piston rings are designed specifically for each application with the best materials and precise fitment

BikeMaster BMXR Series X-Ring Chain - 525 x 25 Feet - Natural 2003 Yamaha YZ125 Each hidden breather is o-ringedBikeMaster BMXR Series X Ring Chain Ideal OEM style replacement chain Offers up to 2x longer wear resistance than regular O ring chains Average tensile strength of 9,000 Pounds Max engine size of 1,000cc street 750cc off road Includes master link Each refined component is designed with computer analysis and provides higher tensile strength than original equipment chains. Specially controlled heat treatment means tougher material and more durability.