Help 954 brake gurus
I put 954 calipers on my Hawk with a'09 CBR600RR Radial M/C. They work great. So great I decided to put them on my '06 Vstrom. 954 calipers and a CBR1000RR radial M/C. Work great on the Vstrom too.
The issue I am having is I keep needing to bleed the M/C to keep the lever feel firm on the Vstrom. Perhaps air is working it's way out of the system still but I get great lever and then a few days later, not so much. I'm not riding daily. More like weekly. I did not overhaul the parts like I did when setting up the Hawk. I have SS lines and I did remove the pistons and thoroughly clean them. I checked and tightened all the connections. Any ideas brake gurus? |
Have you tried back-bleeding them?
My other toy is fickle, and it's reservoir doesn't hold enough fluid to bleed the whole system, so we back-bleed it. Not with vacuum, but with an oil can, fluid, and a section of tubing. Hook the tubing to the bleeder valve and feed brake fluid into the lines from the caliper back up to the reservoir. Watch your levels in the reservoir or you'll have a mess to clean up when it overflows. |
Have you tried reverse bleeding? It's worked well for me, maybe give it a try.
Not that air is your issue, just trying to help. |
Does it happen after you ride the bike or does it happen if the bike just sits for a few days?
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Originally Posted by 8541Hawk
(Post 401502)
Does it happen after you ride the bike or does it happen if the bike just sits for a few days?
2. It happens after sitting for several days to a week. Not while riding. The you think it's just air or do I have a mechanical issue? I'm tending to think it's just air. Persistent Thanks for the responses. |
Since it does it while just sitting, then you haven't removed all the air from the system.
Try bleeding the banjo bolt at the master cyl. |
try tie-wrapping the lever overnight...
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Originally Posted by 8541Hawk
(Post 401584)
Since it does it while just sitting, then you haven't removed all the air from the system.
Try bleeding the banjo bolt at the master cyl. |
Originally Posted by mikstr
(Post 401586)
try tie-wrapping the lever overnight...
I guess I'm wondering if there is any way for air to get in? I can keep bleeding until all the air works out. Before this swap, I put my VTR calipers on the Strom with the stock M/C. Easiest install ever. Just pumping the lever gently and watch the bubbles pop up in the reservoir. Never needed another bleed. The 954's feel great on the Strom and ever better on the 'Hawk. |
Are you using fluid that is old or could have been in a container that isn't properly sealing shut, allowing the absorption of moisture?
@ this point I'd say buy a new bottle of good fluid and try a fresh flush. Ya know... summers eve that SOB. LOL! :evillaugh: |
Originally Posted by Wolverine
(Post 401626)
Are you using fluid that is old or could have been in a container that isn't properly sealing shut, allowing the absorption of moisture?
@ this point I'd say buy a new bottle of good fluid and try a fresh flush. Ya know... summers eve that SOB. LOL! :evillaugh: |
is the bango bolt at the mc the correct one? i had the same issue and it turns out the the bango was a few mm to long, changed it for the right one and the problems away.
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Originally Posted by fabiostar
(Post 401699)
is the bango bolt at the mc the correct one? i had the same issue and it turns out the the bango was a few mm to long, changed it for the right one and the problems away.
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Originally Posted by superbeater
(Post 401873)
Interesting. I'll check. The banjo bolt was supplied by Galfer as part of the SS line kit.
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That's what my wife always tells me, but it doesn't make me feel any better.
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