Mushy Back Brake On Kx-250

How old is your brake fluid and have you bled them? :cool:

You may want to pop the pistons out & check they aren’t seized slightly or there is residue behind them & yeah definitely change the fluid & bleed them again.

There are some other things to help but suspect that this will be your problem.


PS check your pads are not past their best by date or separating from the backings. Also check the reserve cylinder cap is clean so is not blocked causing a vacuum.