wobblegob Posted October 27 Posted October 27 I am using a bandit rear master cyl with a brembo rear caliper. It's bloody aweful, is the master upto the job or is it the pads maybe Quote
Gixer1460 Posted October 27 Posted October 27 No one ever complains that Blandit rear brakes are particularly bad as std., so that sort of implies is the Brembo caliper! There may not be anything actually wrong with it, function wise, but more than likely the piston areas don't match the master cylinder piston size ratio - either under or oversize of each will give poor brake performance. Different pads may help but will always feel wrong / not right! 1 Quote
TLRS Posted October 27 Posted October 27 Could you describe what you mean exactly with awful? Is it the actual retardation or how it feels at the pedal or something? Quote
wobblegob Posted October 27 Author Posted October 27 All bled up, solid pedal but gotta stand in it to even slow it down slightly. I couldnt lock the rear wheel if i tried .........don't know how old the pads are so I suppose the first step would be new pads. Quote
Dezza Posted October 28 Posted October 28 If it's the 2 piston Brembos used as OEM on many Italian bikes, then they aren't that powerful and never will be regardless. The problem is exacerbated by using a master cylinder with too large a piston. It'll work best and feel least wooden with decent pads and an 11 mm master cylinder but don't expect miracles Quote
wobblegob Posted October 28 Author Posted October 28 11 hours ago, Dezza said: If it's the 2 piston Brembos used as OEM on many Italian bikes, then they aren't that powerful and never will be regardless. The problem is exacerbated by using a master cylinder with too large a piston. It'll work best and feel least wooden with decent pads and an 11 mm master cylinder but don't expect miracles Cheers pal going to put in ebc hh and see what I does. Then try different master cyl Quote
wobblegob Posted October 28 Author Posted October 28 I had to stand on it to stop it rolling back lol Quote
bluedog59 Posted October 28 Posted October 28 Are you sure the pistons are actually moving and not seized ? Quote
wobblegob Posted October 28 Author Posted October 28 5 minutes ago, bluedog59 said: Are you sure the pistons are actually moving and not seized ? Yes pistons are all nice and free just does nothing, vaguely slows me down if I stand on it. Don't know how old the pads are, do they degrade with age? Quote
wobblegob Posted October 28 Author Posted October 28 1 hour ago, TLRS said: Have you tried getting some heat in them? Yeah still bugger all 1 Quote
Dezza Posted October 28 Posted October 28 Pads may be contaminated with e.g. degreaser/oil/brake fluid in the past, which wouldn't exactly help either Quote
wobblegob Posted November 6 Author Posted November 6 New pads fitted .......no fucking different ... New master cylinder acquired (matching brembo) so let's see what happens Quote
fab Posted November 6 Posted November 6 how does the disk look? if it has been cooked or glazed it won't work properly . Quote
wobblegob Posted November 6 Author Posted November 6 Disc is pretty much brand new. Cleaned it all over with brake cleaner before new pads went in and it's still shit, so trying a different master cyl (matched to the caliper) Quote
Dezza Posted November 7 Posted November 7 Brembo do several different size rear master cylinders some of which look externally almost identical apart from the numbers stamped on them. All now have 40mm mounting hole spacings. All else being equal, the smaller the master cylinder bore, the more travel at the pedal (least wooden feel) and the best braking power. An 11mm bore mc is the smallest they do. I had to replace my Brembo rear master cylinder and going from a 12mm to an 11mm bore definitely improved the feel and performance of the rear brake (small Discacciati caliper). It went from being 'totally shite' to just 'shite' though . Quote
wobblegob Posted November 7 Author Posted November 7 Hope it's better as wheelieing this is not good without at least some back brake Quote
wobblegob Posted November 10 Author Posted November 10 Changed the master cyl out for a matching (from same bike as caliper) brembo one, at a stand still i can now stop the wheel rotating. So hopefully it will be better on the road now (when I get chance) 3 Quote
Dezza Posted November 11 Posted November 11 What bike are the caliper and mc from? I remember some Aprilia Milles had a recall because the rear brakes didn't work very well and the m/c s were replaced with smaller bore items. I also had a Ducati, which all have those 2 pot Brembos as the OEM rear brake, and that was a shite brake too. Quote
nickmac Posted November 11 Posted November 11 I changed pads recently to some ebc sintered. They do take a while to bed in. Not saying that's what's up but it could add to it. 1 Quote
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.