You can file the shifter unit...
Could you explain a little more please: I'm struggling to think what you could file that would increase cable pull.
if you file out the end stops on the shifter, you can rotate the lever through a wider range of travel, and if it travels further it can pull more cable in total, no?
Oh, the stops: your post suggested the shifter.
@platypus started
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Could you explain a little more please: I'm struggling to think what you could file that would increase cable pull.