Id probably try paraffin wax. Slippery, moisture resistant, won't attract dirt n dust.What are you guys using to lubricate the throttle tube to handle bar?- metal to plastic. My 92' is getting a little dry in there and slowing down some.
This makes a lot of sense- Its def the tube part thats sticky - did the cables when i rebuild the carb-Every time I have tried a lube in there it has made things more gummed up, I prefer a smooth no-lubed finish. Start by disassembling and cleaning everything but then polish both surfaces if possible. The tube should have zero drag without lube if not something is holding you up. It might be a good time to lube cables/check routing while apart.