Is it a new lever or a second hand one? If it's used one then:
Quote:
Originally Posted by Sid Squid
The problem is most probably the lever pivot being a bit sticky. The change mechanism isn't able to reset itself between gears, if you lift the lever with your foot between changes it should work fine.
To fix it properly:
Remove the lever from the footrest and remove the fibre bush from inside the lever *very carefully* - the bush isn't available separately and it's easy to damage - if you look close you can see where the bush is split, gently get behind it and roll it up a little you'll be able to pull it out, if you look inside the lever you'll see where corrosion has built up behind the bush, expanded, and squeezed the lever onto the footrest pivot, causing it to drag, if you gently scrape away the corrosion smear the area with a little grease so it doesn't corrode so easily and reassemble it should be fine.l
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If it's a new lever then the corrosion won't be a problem, but the principle is the same, also make sure nothing got bent/distorted when the lever got damaged
If the lever isn't perfectly free the selector mechanism centring spring can't reset the claws between changes causing the exact problem you're experiencing, but if you reset the lever with your foot you can ride the bike.