Does anyone know where i can get hold of the rubber bung that sits inside your handlebar for the bar end to screw into? Its for a gsxr. 
Suggest a Suzuki dealer. Have you lost it then? The bar end weight should screw into this rubber piece you are referring to and they don’t fall out of a handlebar very easily.
its for my track bike. Lost it after low siding at brands last year. Just remebered about spares direct. Will try them. Cheers, Dan.
Got it sorted. Ordered part from spares direct. Only 2 quid. 
prob abit late now you coulda had the one outta my k4 as i got home from a rideout yesterday with out the bar end that screws into it but it was woth it cracking ride