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552255
Mad Brick Rider
Joined: 13 Aug 2010
Posts: 94
Location: Nebraska
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 Posted: Sat Sep 18, 2010 2:45 am Post subject: Brake handle 2-3 pulls to firm up....after caliper rebuild?. |
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'97 K1100LT 18,500K (new owner)
rebuilt front calipers, new pads, bled lines etc. attached piece metal to compress brake light switch...it wasnt working correctly. (it is now)
'cleaned' rear caliper, newpads, one side was sticking, rear master cyl. guts seems ok.
custom welded footpegs lower 1.25" worked out really well, better than expected...no scrapes yet after 'trying/testing'...
back to the front master:
just cant seem to get the handle to be firm all the time...goes 'squishy' to fast i think, takes at least one or two, three pulls to firm up. (it wasn't doing this initially)
Is there some type of air trapped in the master cylinder itself? Bled lines many times (went out on gravel to get abs working few times, rode home bled lines, @ modulator then caliper)
Or have the rubber seals just been worn out? (maybe from two much bleedin!) in the master cylinder?
Before i get into that re-build, just wondering if there is a 'trick' to getting any air out of master that maybe causing this?
thanks for any help, been a real education working on this bike...as long as it keeps running good (knockin the wood) its been fun. Put over 900 miles on quickly.
Eric |
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Shoganai
Biscuit Fluffer
Joined: 27 Apr 2005
Posts: 2234
Location: Culpeper,VA
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| Posted: Sat Sep 18, 2010 2:47 am Post subject: |
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Most likely you still have air in the brake lines.
Keep bleeding them and it should solve your problem.
_________________
1993 K1100RS aka The Shop Whore
1994 K1100RS aka Blue Streak
The long road is a rainbow and the pot of gold lies there.
So slip the chain and I'm off again,
You'll find me everywhere. I'm a Rover. - JT
Nana korobi ya oki |
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Ted
Site Admin
Joined: 03 Apr 2003
Posts: 1117
Location: Further
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| Posted: Sat Sep 18, 2010 9:50 am Post subject: |
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Did you prime the master cylinder when you bled the brakes? Search here for a great thread on that, sounds like exactly what is going on.
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 Ted
KOG#1 |
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Flying Duck
PsyKotic Waterfowl
Joined: 27 Jan 2005
Posts: 10102
Location: Bumf***, WA
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| Posted: Sat Sep 18, 2010 11:06 am Post subject: |
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| Ted wrote: | | Did you prime the master cylinder when you bled the brakes? Search here for a great thread on that, sounds like exactly what is going on. |
That's not necessary. If you turn the bars to the left then any air in the master cylinder will come out of the hole to the reservoir. It may be necessary to rotate the perch on the bars a little too.
It may be that there is air caught in the "hump" from the modulator to the calipers. If you remove the caliper and fork brace with the splitter in it and hold them up then that air will go to the calipers where it can get bled out. That's how I got the air out when I built my K100RS4V many moons ago.
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DLBass
Mad Brick Rider
Joined: 29 Jul 2010
Posts: 93
Location: Desborough UK
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| Posted: Sun Sep 19, 2010 11:06 am Post subject: |
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Put the bars to the left to raise the master cylinder as high as possible, and tie the brake lever 'on' with a luggage elastic and leave it overnight. Usually works like a dream.
David
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There is only now, yesterday is gone and is unchangeable, tomorrow is uncertain. Live in the moment. |
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552255
Mad Brick Rider
Joined: 13 Aug 2010
Posts: 94
Location: Nebraska
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| Posted: Sun Sep 19, 2010 5:01 pm Post subject: |
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'airbrakes':
"rotated" the master cylinder, all kinds of air bubbles came out...that was the problem....then as i was bleeding front lines again...noticed large amount of brake fluid on floor...traced it on up to a hose.
the brake hose from front cylinder to the metal line above engine NOW leaking, felt a noticable 'break' under sleeve.
the gremlins just keep on showing up.
The thing of rotating cylinder was paramount, the 'hole' definately was not letting air out. It should be mentioned in any 'bleeding' post to be successful.
Thanks
Eric |
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Scott_Anderson
Site Admin
Joined: 05 Sep 2006
Posts: 3122
Location: Central Iowa, USA
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| Posted: Mon Sep 20, 2010 12:26 am Post subject: |
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| 552255 wrote: | | the brake hose from front cylinder to the metal line above engine NOW leaking, felt a noticable 'break' under sleeve. |
Sounds like you may be due for some new flex lines.
They don't last forever.
_________________
Ride safe.
1995 K1100LT 0302044
2017 FLHTK Ultra Limited
Garmin StreetPilot 2820
Garmin Zumo 550
Garmin Zumo XT
"One who does not ask questions is ashamed to learn" Danish proverb
1997 K1100LT 0302488(R.I.P.)
1997 R1100RT ZC62149(sold) |
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Ted
Site Admin
Joined: 03 Apr 2003
Posts: 1117
Location: Further
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| Posted: Mon Sep 20, 2010 9:16 am Post subject: |
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May be time to look at the awesome braided steel brake line upgrade, they are not much more than replacing stock.
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Ted
KOG#1 |
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