Try to disassemble it and clean it thoroughly, then re-lube .
http://shimanostioverhaul.wordpress.com/shimano-600-right-rear-disassembly/
you can find some tutorials here and there. Usually a shitload of WD-40 will take care of it, but I'd rather get it apart, clean-relube it. For longevity.
@Halbert started
London Fixed Gear and Single-Speed is a community of predominantly fixed gear and single-speed cyclists in and around London, UK.
This site is supported almost exclusively by donations. Please consider donating a small amount regularly.
Try to disassemble it and clean it thoroughly, then re-lube .
http://shimanostioverhaul.wordpress.com/shimano-600-right-rear-disassembly/
you can find some tutorials here and there. Usually a shitload of WD-40 will take care of it, but I'd rather get it apart, clean-relube it. For longevity.