• Cheers for the tips guys! I'll give these things a go and see if anything works!

    If not, can anyone recommend someone in London that specialises in older bikes and would fix the existing shifter rather than telling me to replace it like everyone else has aha.

  • Shimano don’t make spares for there Shifters so if somethings broken inside there’s not much to be done.

    Use a spray degreaser, flush it out with that then flush it with a spray lube and see what happens

  • Can you post exact shifter model please? I am going to assume older 105. Do what Roadwarrior says then report back

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