Hi Claudio,
The gear change action on my road bike was inconsistent and when I
took the preselector unit apart I found wear on the friction washer
pegs and slot, so when I changed gear the wear was letting the
control shaft to rotate backwards a little which made the pushing
ratchet-pawl sometimes miss the next tooth on the control shaft.
To fix this I have made some new washers, three with a square internal
peg and three with a point which fits inside the casing as shown,
this is a better design as the area of contact
is spread over 2cm of each edge.
Colin
Edited by IMSA - 18/4/2016, 04:00
