Another concern is why did this one break. Are you the original owner? If not, we can hope that the previous owner broke it one time when he had it off the bike. But IF that piece is still in your cases, I'd be worried about it damaging other components. Is there something in the kickstarter, KIPS, or waterpump that can contact that tab? Maybe it was bent a little and hit something. (I think that tab hangs out and could only hit the side case itself. Most of the gearing etc. is closer to the centerline of the engine.) If you are not sure, I would take a really close look at the other tabs and the components in that side case. If you look closely, you can see cracks before they become failures and something fractures or seperates. Let me know more history of the bike. I'll sleep easier. A dealer mechanic may also have contributed to "lightening" your clutch hub.