Namura Piston Rings for for 2004-13 Yamaha YFM125 Grizzly - 49.00mm - NA-40019R 2013 Polaris Sportsman 850 HO Touring LE EPS Blue Fire as soon as the system

as soon as the system notices an increase in power it switches from closed loop (oxygen sensor feedback) back to open loop (no feedback) and will correct the fuel/air ratio by the amount you selected on the PowerJet

engine air scoop

1998 Yamaha YFM350U Big Bear 2x4

2005 Yamaha YFM660FLE Grizzly 4x4 Limited Edition

Namura Piston Rings for for 2004-13 Yamaha YFM125 Grizzly - 49.00mm - NA-40019R 2013 Polaris Sportsman 850 HO Touring LE EPS Blue Fire as soon as the systemNamura Technologies Piston Rings Part Number: NA 40019R 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