Did anyone else have a real hard time bleeding the new lines? Took me 3x as long as it should to bleed the brakes. Is there a trick that I should have used?
Ended up using two small dixie cups and fish tank tube to get it done.
(Haven't read other replies yet)....
Syringe is undoubtedly the quickest way. Make sure it's a BIG one too and with a length (about 1 ft - 300mm of clear hose on the outlet). Once braided lines in place, make sure reservoir is empty. If you have two seperate lines, one to each caliper, fill syringe and squeeze until fluid is just about at the open end of the clear line. Open the bleed nipple on the caliper. Place the hose end on the nipple securely. Give a good fast squeeze without squirting fluid out all over the caliper and brakes etc. Tighten the nipple up, pull off the hose and re-fill the syringe... Repeat until you see the fluid just starting to appear in the reservoir (it may pay to have someone else watching the reservoir). Now Stop. This may only take one good squeeze or two at max depending on just how big your syringe is. Now do the opposite caliper the exact same way. Just be careful as the fluid may flow into the reservoir straight away on the second caliper and may over fill very quickly BE CAREFUL here...!!! Now make sure both nipples are nipped up tight.. If you did it properly, your lines from the reservoir banjo will be clear of air bubbles straight away. BUT there will still be a few tiny tiny little air bubbles at the top banjo(s), so pump that brake handle slowly and watch them all come out. They will all come out reasonably quickly then stop. DONE...!!! Do everything up tightly and give a good wipe with a rag to get rid of excess fluid which may have escaped throughout the process... After that, squeeze the brake handle many times to make sure it is quite tight to the feel. Now check for any leaks. I use toilet paper to soak up any leaky fluid as this stuff shows up fluids very easily on it. If any appears, you have to check your hoses and banjos and washers to find and seal that leak...
Now take the bike outside and hose it down proper to get rid of any fluid you never saw before. There WILL be some so don't think you can get away with it or you will ruin some paintwork on the bike...
If you have a brakeline that sees one line down to one caliper then another line that jumps from that caliper to the other, I suggest you use the exact same method from the last caliper. Just squeeze the brake fluid from this caliper until the reservoir is topped up. Make sure you apply enough pressure when you force the fluid in and you wont have to bleed the first caliper. Again once the fluid is in, squeeze out those small air bubbles at the reservoir.
If you wish to do the "ordinary way"...
Top up the reservoir. Apply a bleed hose to one of the bleed nipples on one caliper. Have someone give the brake handle a good hard squeeze. Now open the nipple. The squeezer will notice the handle go soft. Before he releases the handle, you must tighten the nipple. Now release then squeeze the handle again. Open the nipple again. Now you should see bubbles and fluid coming down the bleed hose. Tighten the nipple. Let the handle go. Make sure you have enough fluid in the reservoir. Keep repeating this process until you see no more air in the bleed hose.. Now do the other caliper just the same.
Sequence in short...
Top up fluid.
Squeeze brake handle.
You'd be amazed at how many people get cocked up in this process and wind up sucking air back into the line...
Now pump up the brakes and hopefully it will get tighter. Watch for those small bubbles in the reservoir. Once you see no more bubbles, put the lid back on the resrvoir and wash down your bike as above. I urge you to do one more small proof bleed again after about 10 minutes with this method just to make sure,, as it is not as good as the above pressure bleed. It is still possible to get a few bubbles coming out.