As long as it also has not developed a flat edge, otherwise it just wont put enough pressure around the jet.
HERE is the gasket, if you need it.
I cant seem to find a jet O-ring in the shop, Bruce might be able to help with that though. I will check if the fuel tap O-ring will be suitable.
When cleaned up, the G3 carby works wonderfully, if the points become to much of an issue, they can be replaced with a module, without changing the engine.
The G3 was only run for a few years, and machines that are originall with it, are slowly becoming hard to find, there are plenty of S80 Super 600's out there, we dont need to make another commoner out of an uncommon machine, Plus theres no need to toss a good engine.