K&N Air Filter YA-1020 YZF R1/M '20-'23 Honda Once the grooves are deep

Once the grooves are deep enough the sealing surface is lost allowing water and dirt to pass through and contaminate the bearing

Throttle governor

Brand New Clutch Drum Bell Housing Reduction Gear Box + Heavy Duty 2 Shoes Centrifugal Clutch Plate Fit 43cc/49cc Mini PIT Dirt Pocket Bike Mini Quad ATV Pocket Rocket T8F CHAIN

- New Improved and Stronger 8 Ball Joint

K&N Air Filter YA-1020 YZF R1/M '20-'23 Honda Once the grooves are deepIn the early 1960s two motorcycle racers Ken Johnson and Norm McDonald (K&N) developed a ground breaking new idea for an air filter. After experimenting with numerous types of filter media they discovered that an oiled cotton design allowed the filter to not only capture contaminants very efficiently but also allowed it to be washed and reused and the original K&N High Flow Air Filter was born. Five decades later K&N is still innovating industry