New, never opened, I got a new bike:
Front Sprocket: Fits 98-07 ZX6R. 14T (-1). Fits 520 chain. New $25.
Rear Sprocket: Fits 98-06 ZX6R or 04-06 10Rs. 42T (+2). Fits 520 chain. New $55.
Asking $30 + shipping for the pair. Can sell separately if needed for 15/25.
Pics below.