hydraulic brake actuation

On Jan 7, 3:19*pm, DRN wrote:
You say you have "long run of stretchy cable".
If you didn't replace it, you're using up lots of travel stretching
the cable.

May be a minor point but the lost motion in light weight bowden cable
systems is typically not caused by stretching of the inner, rather by
compression of the coiled outer sheath.

On a cable with any bends the compression shows up as a change in the
shape of the cable run. Cable length change caused by compression of
the outer is the reason that special non compressible cable outers
were developed for 9 and 10 speed indexed bicycle gear systems.

The compression of the outer sheath can be reduced by minimizing
bends, optimizing bend radius, and/or by going to a heavier gage. All
cable fittings should butt square when relaxed or under max load.
Optimizing the cable run can work wonders even if the materials are
not changed.

Andy
(Years of experience with British motorcycles and now relearning it
all building and modifying mountain bikes)