Aluminum CAT5 Rear Sprocket KX60 - Silver - Vortex Size:41T and they can be exchanged

and they can be exchanged for use

Once pressed in and the bearings are installed

Roto-blasted surface for toughness and scratch resistance

So if your looking for replacement plastics for your bike there really is only one choice - use what the factory teams & champions use and that's UFO Plastics

Available in four bend options this bar is ideal for MX

Aluminum CAT5 Rear Sprocket KX60 - Silver - Vortex Size:41T and they can be exchangedVortex 420 CAT5 Aluminum Rear Sprocket Silver Fits all years of the Kawasaki KX60 The Vortex CAT5 Aluminum Sprockets feature a unique CNC machined design and a anodized finish that makes them look fast even when standing still. But great looks is nothing without performance to match. An aluminum sprocket is much lighter compared to OEM steel sprockets and this leads to reduced rotating mass and allows for improved acceleration and handling. Features: