A silly malfunction but annoying all the same

[ProfessorWerewolf]

Hello everyone, new guy here.

I've been riding my GZ250 for about three years since I bought it new. Everything had been running great (famous last words) until something strange happened. I was sitting at the traffic light when I noticed that the right-side handlebar cup (on the very end of the grip) was loose and hanging out. I pushed it back in and started threading the screw with my fingernail when I noticed that it was not catching at all. Now I've come to find that whatever is inside the handlebar to receive the male end of the screw is loose and rattling around the inside of the bars. The throttle grip is in no danger of falling off but it is still soemthing that bothers me.

Does it ruin the bike? No. Is it one of the most annoying things in the world to hear it rattle when I ride? Absolutely.

Does anyone know of a fix for this or should I just bite the bullet and take it to the shop? Any suggestions are appreciated.