trialstaz

Can be tricky but following has always worked on Evo for me: Make sure rear slave cylinder pistons fully in (I take pads out and put a piece on wood in to hold pistons in), take master cylinder cap off. Get a decent size syringe and small length of clear pipe - prime syringe/pipe with fluid - then fit on caliper nipple. Crack the nipple open and carefully compress the syringe - fluid will rise in the tiny master cylinder reservoir - if bubbles then keep pumping (use another syringe to drain excess in master cylinder). Keep pressure on rear syringe and Pump the brake pedal - if no resistance then normally air trapped in the banjo on top of master cylinder - keep pressure on rear syringe, crack the banjo slightly and push pedal down. Keep pedal down and nip banjo and rear nipple - you should then start to get a pedal - sometimes need to repeat one or 2 times. Refit M/cyl cap and carefully wash any brake fluid and refit pads etc. if master cylinder seal leaking you will get small bubbles in reservoir when pumping it. Agree if master cylinder bore scored etc then replace unit.