AS3 Performance rear sprockets crafted from 7075 aluminium are a game - changer. Designed and made by one of the world's top sprocket manufacturers, they've been tested by top riders on the world's toughest tracks. These lightweight and durable sprockets are CNC machined from high - quality 7075 - T6 aluminium. Each sprocket has self - cleaning grooves between teeth and a smooth anodised finish with AS3 Performance branding. With 49 teeth, it fits 2021 Rieju MR 300 Racing, Pro, and Ranger models. Key features include being CNC machined for strength with minimal weight, over 50% lighter than standard OEM steel sprockets, having self - cleaning grooves, a polished anodised finish, and being tested on tough sand tracks. It's a product from a UK company with a 12 - month warranty, and you'll get the exact sprocket as shown in the picture.

Using this AS3 Performance rear sprocket is straightforward. Just replace your old sprocket with this new one according to your bike's manual. When riding, the self - cleaning grooves will help keep dirt and debris away from the sprocket. As for maintenance, regularly check the sprocket for any signs of wear or damage. If you notice any chips or excessive wear, it's time to think about a replacement. Keep it clean by wiping it down with a soft cloth after each ride. And don't worry, it comes with a 12 - month warranty from the UK company, so you're covered if there are any issues.