Those shifters can quite often be fixed by flushing through with gt-85 or similar. The grease in them seems to go off and harden over time stopping the mechanism working correctly. If that doesn't work they can be taken apart and cleaned, it is a pain in the arse though.
Those shifters can quite often be fixed by flushing through with gt-85 or similar. The grease in them seems to go off and harden over time stopping the mechanism working correctly. If that doesn't work they can be taken apart and cleaned, it is a pain in the arse though.