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View Full Version : Master Cylinder, self bleeding?


punkyp
02-12-12, 08:24 PM
I changed to braided hoses and bleed the brakes for ages, until all the bubbles were gone.

I then realised I had to route them differently, so I removed the banjo from the master cylinder change the route and did it back up, I then thought "I'll deal with bleeding later" I then carried on with my handlebar conversion and forgot about it.

Thing is I went for a test rider after and the brakes seemed fine. Will any air make its way to the reservoir or do I need to bleed again before riding?

Sid Squid
02-12-12, 08:40 PM
No, but a small amount of air can occasionally, if the master cylinder bore is at the right angle, make it's way back through the relief port into the reservoir.

So in the most minor and unintentional manner, it can sort of bleed itself, a bit, maybe.

Don't count on it though.

punkyp
02-12-12, 08:42 PM
No, but a small amount of air can occasionally, if the master cylinder bore is at the right angle, make it's way back through the relief port into the reservoir.

So in the most minor and unintentional manner, it can sort of bleed itself, a bit, maybe.

Don't count on it though.

Thanks. so you would advise bleeding again?

Sid Squid
02-12-12, 09:47 PM
Depends, if it feels just as it always did then there's nothing to bleed out.

Either that or it has always had loads of air in it, and you've just got used to having a brake that's really spongy and horrid, so you think that's normal :D.

Which, whilst not impossible, seems less likely.