you probably need to replace the potentiometers... although this video might be of some help http://www.youtube.com/watch?v=xKw1T3nQr_o
@daf 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.
you probably need to replace the potentiometers... although this video might be of some help
http://www.youtube.com/watch?v=xKw1T3nQr_o