Definitely nowantium.
I was replacing my clutch cable, the stock one was too tight. I 've swapped it for a longer version.
The damage is the top hole of the gearbox inspection cover. When loosened, there was a quiet crack. All bar one of the 5 pieces were found on my mat and the frame. One piece was sitting inside the gearbox on top of the kickstart spring. Haven't told my wife about using her tweezers.
New one and gasket on order. Feeling lucky all the pieces were easy to find. Will be very careful to check how the new one sits on there and tighten carefully.