Here's a guide on hot to bleed your Magura HS33 hydrolic brakes:- Losen the TPA all of the way off. Move the whole lever up so that it's pointing forwards instead of down. Fill a syringe with water or oil, it's your choice but I like water better because it gives a better feel to the lever. Take the bleed bolt off of the slave cylinder. Use one of the clear tubes shown up there in the first picture and screw it into the bleed hole but make sure that the tube is full up with water before you screw it on. I find it easier to put the syringe on the pipe and fill the pipe with the syringe. Undo the little grub screw on the lever body pictured below; Take the other clear tube and screw it into that hole. Ask someone if they can hold an old butter tub or something under the plastic pipe coming from the lever otherwise you'll get oil all over your rim/rotor. Now that's all done up nice and tight pump the syringe until most of the fluid from it is gone. (Remember to go from the slaves to the lever!) Now look at the tube coming out of the lever, if it has air in you need to do that again. (When you take the syringe off of the pipe remember to get someone to put their finger over the other end. ) When no more air comes out of the pipe then it's finished. Take the pipe off of the lever and put the grub screw back in but remember when you're taking the pipe off of the lever remember to leave the syringe on the pipe coming from the slave. Now take the pipe off of the slave and put the bleed bolt back in. [edit] Bleeding Maguras in a bucket or a bath Fill the bucket or the bath full of water. Take the brake off of your bike and put it in the bucket/bath. Undo both bleed bolts, the one on the lever and the one on the slave. (Underwater) The method is tricky at first, but once you have the rhythm, it will take a minute at maximum. Underwater: hold your finger over the hole on the slave cylinder (remember, when you have your finger on the hole, make sure it is tight and sealed against the hole, other wise it will take longer to bleed and may effect performance), press the lever all the way down, take your finger off of the hole and release the lever fully, repeat until you no longer see any air coming out. Do up both of the bleed bolts. (Again, underwater) Take the brake out and it should be air free. Hope i helpd, Sonny