Sodding Brakes...

Dee · Post by **Dee** » Fri Nov 17, 2006 10:49 am

Max wrote:You want the pistons to be completely free of any build up. Sometimes hard to see and not easy removed with just a shot of brake cleaner (requires a little rubbing). When you say the seals are fine, do you just mean they don't leak? Or are the pistons freely pushed in and out?

The pistons can be freely moved by hand. I made a point of checking that, as that was the main sign that the seals had gone in my old calipers.

They dont leak either!

Post by **Max** » Fri Nov 17, 2006 12:28 pm

Another problem if they are not releasing could be a small amount of air still lurking in the caliper that expands when hot.

Post by **Max** » Fri Nov 17, 2006 12:28 pm

Or... doh... have you checked the master cylinder? Does the plunger (piston) return freely?

Dee · Post by **Dee** » Fri Nov 17, 2006 2:23 pm

The master cylinder has been overhauled recently and is OK, but your point about the air being trapped in the caliper is a good one...and certainly one that I haven't thought of. Cheers!

Post by **phuk72** » Fri Nov 17, 2006 2:27 pm

Air in the system is often overlooked or not noticed, especially if you have braided hoses. Be prepared to pump a load of fluid through the system to get rid of it though.

Dee · Post by **Dee** » Fri Nov 17, 2006 2:33 pm

phuk72 wrote:Air in the system is often overlooked or not noticed, especially if you have braided hoses. Be prepared to pump a load of fluid through the system to get rid of it though.

That's the weird thing, though. They've been bled to death! Even given that I've probably cleared the whole of the Isle of Man of its supply of DOT4(!), I may give that a go again too. Thanks.

Doyle171 · Post by **Doyle171** » Mon Nov 20, 2006 12:04 pm

Try Bending and Flexing the lines between each pump of the leaver. he he that almost soounds rude.

Flagman · Post by **Flagman** » Sat Jan 13, 2007 6:39 pm

I had major problems bleeding the front brakes after fitting braided hoses and a caliper stripp down could not get the air out , bought a vacuum bleeder from Hien Gerike (about Ãƒâ€šÃ‚Â£35) bleed all the air out in minutes brakes, with double HH EBC's now much better.

I noticed a mention of Brembo being owned by Yamaha and as the Japan market bikes had Brembo's where they any better/ different ?

Post by **phuk72** » Sat Jan 13, 2007 7:06 pm

I noticed a mention of Brembo being owned by Yamaha and as the Japan market bikes had Brembo's where they any better/ different ?

Brembos marginally better than the UK spec calipers (but blue spots are the way to go)

Post by **Max** » Sun Jan 14, 2007 2:00 am

Marginally?

Slap a brembo radial pump on there and "magically" would be the word!

Greg · Post by **Greg** » Mon Jan 15, 2007 11:59 am

Air problems can often be solved by magic... well, overnight anyway !

Try using a bungee or cable-tie to hold the lever back against the twistgrip overnight. I know it shouldn't work - but it did for me and transformed a nasty spongy brake back to a nice hard squeeze...

G

Post by **Max** » Mon Jan 15, 2007 12:13 pm

Greg wrote:I know it shouldn't work - but it did for me and transformed a nasty spongy... to a nice hard squeeze...

G

Hmm... Wonder if it will work on my Mrs...

Post by **phuk72** » Mon Jan 15, 2007 12:16 pm

Slap a brembo radial pump on there and "magically" would be the word!

Shut the f#ck up about it why don't ya

- everyone knows you've got a radial

Hmm... Wonder if it will work on my Mrs...

Just what I was thinking

trixynut · Post by **trixynut** » Mon Jan 15, 2007 2:10 pm

Just what I was thinking

..were you thinking about your missus or Max's??

Post by **phuk72** » Mon Jan 15, 2007 2:25 pm

..were you thinking about your missus or Max's??

That's for me to know ........