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Old 02-23-2015, 07:28 PM   #1
picinisco OP
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front brake bleeding

My R100 frankenbike has a Suzuki RM250 front end. The master cylinder is a universal unit with a new hydraulic line. I have bled many motorcycles and car brakes but this one is puzzling me. On the center stand with the front wheel off the ground I get great pressure. As soon as the bike is off the stand and rolling there's very little pressure without pumping. I have repeated this several times over the past three weeks but no change. Is there something I am missing in this setup.
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Old 02-23-2015, 09:59 PM   #2
pommie john
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Run out/ distortion in the disc knocking the pads back?
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Old 02-24-2015, 06:10 AM   #3
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shes still got air in er, captain
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Old 02-24-2015, 06:16 AM   #4
picinisco OP
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Quote:
Originally Posted by pommie john View Post
Run out/ distortion in the disc knocking the pads back?
Just checked. There is one spot where there is a 1mm bump. Is this enough to push the pads out to where I need to pump them?
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Old 02-24-2015, 11:43 AM   #5
chasbmw
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Quote:
Originally Posted by picinisco View Post
Just checked. There is one spot where there is a 1mm bump. Is this enough to push the pads out to where I need to pump them?
If you have got a 1mm bump in the disc, it's not the bleeding that will give you problems, the brake will be impossible to use safely
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Old 02-24-2015, 01:19 PM   #6
picinisco OP
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Quote:
Originally Posted by chasbmw View Post
If you have got a 1mm bump in the disc, it's not the bleeding that will give you problems, the brake will be impossible to use safely
Not to worry. New disk on the way.

Thanks for all the replies.
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