Formula B4 SL Brakes

• Take the Handle bar master cylinder cover off. This levers off with a small screwdriver to expose the fluid bladder.
• Remove the bleed screw from the Caliper (wheel end) being carefull to make sure you don't loose the small O ring. I just leave it in there. Screw on the adaptor and attach an empty syringe (#1) pushed all the way in. No fluid will come out as the system is still sealed.
• Loosen the master cylinder (bar end) and swivel it round so the bleed screw is uppermost. undo the ridiculously small torq 10 screw and fix syringe #2 to it. This one should have the plunger removed and be empty. Hold vertical, I tie it to a weighted length of string and hang it over a ceiling hook.
• Plumz special stage now, slowly push in the bladder with your finger, you will see the fluid forced into the top syringe, if this is black its a sign that some internal seals or the bladder are deteriorating, though the brake still works fine long after this is seen.
• If the fluid is black, keep your finger on the bladder and tip it away, don't move that finger though, pour in a similar amount of fresh fluid and release the finger to suck it back in. ( I've done this step alone as a quick fix before now too)
• Pull #1 syringe slowly and pull all the old fluid out of the Caliper.
• This can be quite a small amount with new pads, pull off the syringe and dump it.
• Fill with fresh fluid the #1 syringe and remove all air in it doctor stylee, then re-attach.
• Push this in slowly (too fast and the tube will pop of and you will curse big time) Untill its almost empty, not too far or you will push air into the system. Note syringe #2 should fill as you do this.
• Pull the fluid back again, this draws out any local air, this time don't empty syringe #2 you must leave some fluid in it or again you will draw in air. Repeat several times untill bored, or no more bubbles are evident (be carefull you are not sucking in air from a poor syringe to plastic tube connection.
• Now leaving barely no fluid at the handlebar syringe #2 to save a mess, check the bladder is not sucked in, it should be full of fluid, it might need a squeeze if it is sucked in. Now disconnect this syringe and quickly replace the bleed screw. you should be tightening it against fluid, if not you are trapping air in there.
• Tie the lever to the handlebar with a zip tie or elastic band.
• Pull and release syringe #1 SLOWLY and not too far, this will try and eek the last bubbles out of the caliper.
• Take the syringe #1 off and replace the bleed screw and O ring seal if removed.