Originally Posted by Spanner Man

Good morning.

It sounds as though the piston in the master cylinder is getting a little 'grungy'.
If you carefully lift the rubber boot that's around the piston using a pointed tool of some sort, & squirt a little bit of silicone lube in there it should solve the problem.
I wouldn't use WD40 or similar, as this could contaminate the hydraulic seals, & cause them to swell.


Cheers.