Checked under my sprocket cover today... what is this?

[bandit]

That's the original sprocket design or what's left of it the orange nylon is shock/noise damping (see here)


https://www.tapatalk.com/groups/fazerown...30268.html


I would replace sprocket & fit the new 12mm nut & locking washer,


http://www.wemoto.com/bikes/yamaha/fzs_6...t_kit_oem/


If you won't the same type sprocket with the damping,


https://www.ebay.co.uk/itm/Yamaha-FZS600...SwaWhZzr6B