scraggydog64 Posted March 2, 2008 Report Share Posted March 2, 2008 Hi I am having some brake bleeding trouble, I have tried all of the methods known to mankind including syringes. I have now resigned myself to the fact I need a brake bleeder, Venhill, Ezi Bleed or similar. Does anyone have any thoughts as to which to buy or what not to buy?. I have four bikes so I don't mind spending a few quid if it will take the hassle out brake bleeding. Thanks in advance, Scragg Quote Link to comment Share on other sites More sharing options...
jmck Posted March 2, 2008 Report Share Posted March 2, 2008 Been using a Mityvac for years with great success. Quote Link to comment Share on other sites More sharing options...
paulthistle Posted March 4, 2008 Report Share Posted March 4, 2008 Buy a piece of plastic hose that will fit snugly over the bleeder. Put a loop about 40mm in diameter near the bleeder screw. Put the other end in a can. Open the bleeder screw and pump the lever. You can see if air or fluid is coming out. The important part is to get the master cylinder pumping first. On problem child master cylinders, I remove it from the machine and put in a vise. I attach a short hose to the output and loop it back to the resevoir,immersed in the fluid. Pump until all air is out of the line, you will see the bubbles coming out of the line. Then take your syringe and fill the system to the mastercylinder hose union. Hold that line up to keep the fluid in it. Then fill the master cylinder with fluid and put the cap back on. Hold the master with the out put up, so as not to spill any fluid. Put your bolt in the hose and and quickly connect the two. A slight squeeze of the lever right before you tighten the bolt will force out the last bit of air. Make sure you only squeeze and do NOT let off before you get the bolt sealed. Quote Link to comment Share on other sites More sharing options...
trialsurfer Posted March 4, 2008 Report Share Posted March 4, 2008 Made my own vacuum bleeder, small vac pump with a container, hose from pump to container, then hose to the MC---works like a charm! Quote Link to comment Share on other sites More sharing options...
andy.t Posted March 5, 2008 Report Share Posted March 5, 2008 Could be a stupid question,but have you checked that the bleed nipples are clear,I had some problems bleeding my brakes then realised the nipples were a bit blocked. Quote Link to comment Share on other sites More sharing options...
fatbloke Posted March 11, 2008 Report Share Posted March 11, 2008 I have had big problems in the past, mainly with the twin piston AJP kit fitted to modern bikes.The bleed point is not at the end of the fluid path, the second, or inboard piston, is past the bleed nipple, so air in there is sometimes a complete B*&*&*d to get out. The local scooter shop gave me a tip that works when you have tried everything else. The scooter reference might sound a bit strange, but lots of modern scooters run with AJP brakes, and he works with them every day, so I listened. When you have given up trying to get the last bit of air out of the calipers, take it off the bike, remove the pads, and pop the pistons out of the cylinders.Split the caliper, carefull with the little O ring between them. Clean everything up, and fill the cylinders with brake fluid. Enter the pistons back in, forcing a little bit of fluid out of the linking hole. Bolt up the caliper halves, and again push the pistons in just enough to force fluid out of the bleed hole, and brake hose connection point. Fit the pads, bolt the caliper to the bike, fit the hose, but leave it not quite tight. Again push the pistons back in the caliper slowly, allowing fluid to come out of the hose connection, then nip that tight, then the same with the bleed nipple. Continue now with normal bleeding . It's never failed me. Good luck. Quote Link to comment Share on other sites More sharing options...
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