Zmilin
Saddle Sore
Reged: 03/02/07
Posts: 5109
Loc: Sammamish, Washington - USA
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So a few days ago I decided to change my rear brake fluid. I did this by pouring in new fluid and bleeding out the rear brake. Much to my dismay I must have let an air bubble in there.
I removed the caliper yesterday and made sure it was good to go and ran some more fluid though there. Ive tried the trick we use on the front (to tie the brake down overnight and no luck.
Last resort... I went out and bought one of those brake bleeder tools that pushes fluid in through the caliper.
Ill be doing that on Sunday. :bang head:
In the meantime if anyone has any tips please share. 
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07 Black BA, 39mm FCRs, TPUSA stage 1 head, TPUSA 813 cams, TPUSA 10.8:1 pistons, TTP #3 igniter, Specialty Spares Long Cannons, Tsukayu Hard Bags. 82HP/55tq
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mikemm03
Loquacious
Reged: 01/13/05
Posts: 3750
Loc: Tennessee by the grace of god
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Been there don that. Just stay after it, the air bubbles get trapped in the lines and are a rascal sometimes,
As I've said before the brakes on these bikes sux, to bleed!
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Red Devil and Hornet
It's not speeding till you get pulled over.
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The_Dog33
Fe Butt
Reged: 02/01/07
Posts: 16989
Loc: NE PA USA
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Did you get a clean glass jar and put fluid in it then attach a piece of clear tubing to the bleeder and put the other end of the clear tubing in the jar below the fluid level and pump the brake? Make sure the reservoir stays full as you do that and the tube stays below the fluid level.
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I learned all I need to know about life by killing smart people and eating their brains.
Eat right ,Exercise ,Stay fit, Die Anyway!
some shots of our bikes
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MACMC
Loquacious
Reged: 12/16/06
Posts: 2521
Loc: Kansas City, Mo.
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I'm cheap, got a large marinate syringe and a foot of clear tubing at Ace Hardware, $6. Have someone continually refill and occasionally manipulate the brakes, suck out the fluid from the nipple. You can see the air bubbles exit through the tube. Store contraption in freezer bag, won't have a glass jar collecting dust in the garage or wife wondering where the mayonnaise disappeared to.
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Keith
Stickman Yogi
Reged: 03/21/09
Posts: 11609
Loc: BC, Canada
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When I changed my brake lines I had to remove and dangle the rear caliper by the flex line so it all went downhill. Only then could I get it to bleed out properly.
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Live to love, love to live.
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Ryk
Learned Hand
Reged: 05/19/10
Posts: 1621
Loc: Pac. NW
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I just went through hell today bleeding the clutch on my old Alfa Romeo. I finally got it to bleed properly by completely collapsing the hydraulic pot on the slave with a clamp (eliminating any possible air in the slave itself) and raising the unit as high as the hose would allow with the bleeder straight up, took one try. to get the damn air bubble out, wish I did that straight away, 'stead blowing off a couple of hours of my time. Collapse the pots with clamps and you can bleed hydraulics without them being insitu on the bike. 
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Zmilin
Saddle Sore
Reged: 03/02/07
Posts: 5109
Loc: Sammamish, Washington - USA
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OK... I rebuilt the rear MC today as well as the rear caliper. No air coming through the lines and still no pressure. WTF! 
I had to walk away from it and will get back to it tomorrow sometime.
I did find a stuck piston on the rear caliper. Bugger would not budge without help so I inserted the other piston, used a paint stick to hold it in place and blew more air through the caliper. BAM. Clean pistons, clean bores. Repalced the seals and bled the brakes.
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07 Black BA, 39mm FCRs, TPUSA stage 1 head, TPUSA 813 cams, TPUSA 10.8:1 pistons, TTP #3 igniter, Specialty Spares Long Cannons, Tsukayu Hard Bags. 82HP/55tq
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Trumpeteer
Adjunct
Reged: 07/07/10
Posts: 323
Loc: Currently in Japan
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Save yourself the headaches and reverse bleed your brakes; this is the only way I do my brakes and it is a heck of a lot less hassles this way.
http://www.youtube.com/watch?v=2t0e0Leu1-k
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Zmilin
Saddle Sore
Reged: 03/02/07
Posts: 5109
Loc: Sammamish, Washington - USA
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Quote:
Save yourself the headaches and reverse bleed your brakes; this is the only way I do my brakes and it is a heck of a lot less hassles this way.
http://www.youtube.com/watch?v=2t0e0Leu1-k
Yeah... thats the idea. I have a reverse bleeder and I agree... they are awesome. Worked like a champ on the front. The rear seems ot want to keep me from riding though.
Im going to drain it tomorrow and refill. 
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07 Black BA, 39mm FCRs, TPUSA stage 1 head, TPUSA 813 cams, TPUSA 10.8:1 pistons, TTP #3 igniter, Specialty Spares Long Cannons, Tsukayu Hard Bags. 82HP/55tq
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Zmilin
Saddle Sore
Reged: 03/02/07
Posts: 5109
Loc: Sammamish, Washington - USA
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Checked it all again... no luck. I did notice one of the rear caliper pistons was not moving. I could see the gap.
I pulled it apart and it seems I pinched a seal just enough to shave a piece of rubber off the size of a hair. It was probably keeping it from moving.
Thing is... I was still not building pressure in the brake pedal. Makes me worry that maybe my MC is shot. Fluid flows well when I uncork the system.
I pulled the MC apart again and no visible issues there.
I ordered another rear piston kit and now have to wait a week for it to arrive.
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07 Black BA, 39mm FCRs, TPUSA stage 1 head, TPUSA 813 cams, TPUSA 10.8:1 pistons, TTP #3 igniter, Specialty Spares Long Cannons, Tsukayu Hard Bags. 82HP/55tq
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