The R154-50 Honda Ultralite rear sprocket is designed for motorcycles like the Honda CR, CRF, and XR series. Here are some details about this sprocket:  fitments in pics.

• Tooth Count: It has 50 teeth.
• Material: The Ultralite sprocket is made by Renthal.
• Compatibility: It fits various Honda models, including the CR125, CR250, XR250, and XR400.