I did the rear brembo hidden caliper mod and got a custom made spiegler line. I rebuilt the entire caliper, new pads, resurfaced the rotor, and bled it. It firmed up(I thought), but after riding the bike there is next to no clamping force. I will try to bleed it again, but just wondering if this is common because I've seen others complain of the same issue when using the stock master cylinder with the brembo caliper. Any input from those with the same issue or those that used the stock MC with brembo caliper and didn't lose braking force, please post up. If it won't bleed and get firm I'll have to try another MC.
Lost rear braking power with brembo mod
- Thread starter snrusnak
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konarider94
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i can still lock up my rear tire with the stock master and brembo caliper. its not as easy if the rear brake is cold, but i think thats mostly due to the hh rated pads.
I think you have a problem with a sticking piston, air bubble or something. In my opinion, the Brembo mod is for cosmetics, as there is no perceptible increase in rear brake performance that I've experienced or read about. That said, at worst, you should still be able to use your rear brake as with the normal caliper, with no decrease in function or performance.
I can't say that I noticed an improvement in braking with the brembo caliper and stock master cylinder but it does work just fine. It can be difficult to bleed all the air out of the rear system. How are you bleeding it? I can't get mine to bleed properly with my vacuum bleeder so I always manually bleed the system...several times.
Thanks for all the feedback guys. I understand it won't perform better than stock but I expected it to be the same. Maybe there's air in the line then. I rebuilt the entire caliper, so it's definitely not a sticking piston. I even took all the pistons and the bores and honed them. I was using a vacuum pump, I'll try doing it manually. When it was stock I would let off the front brake right before stopping at a light and finishing braking with the rear brake(light foot pressure). I did that this morning and almost rolled through the light lol.
motoqueiro
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where did you get the parts from?, I need the repair kit and canot get the parts
sparky300
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Try tapping the caliper lightly (rubber mallet, hammer and a block of wood, etc) while bleeding it to release any trapped air
Btw, did you order the new brake line with I.D. the same as stock? Rubber? Maybe the line is expanding under braking? Just thinking aloud...
Btw, did you order the new brake line with I.D. the same as stock? Rubber? Maybe the line is expanding under braking? Just thinking aloud...
motoqueiro
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My thoughts exactly, however brembo does not do the repair kit for the caliper, and the only one I fond was in the us and they don’t ship internationally
I need the O ring that connects the two halves
If you found the kit in the US I would be willing to ship it to you.
The custom line I don't know exactly how the ID matches the oem ID but it's a SS line, it's top quality, I doubt it's the problem. I don't think it's expanding at all.
Will try more bleeding.
The custom line I don't know exactly how the ID matches the oem ID but it's a SS line, it's top quality, I doubt it's the problem. I don't think it's expanding at all.
Will try more bleeding.
motoqueiro
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Try this, remove the caliper from swing arm, remove pads, compress the pistons the maximum they go before they fall of the caliper, then force them inside the caliper and do the normal bleeding.
I bet you got air in the piston and not on the tubing
I bet you got air in the piston and not on the tubing
I've bled mine several times both manual and with vacuum and its been a real challenge every time, both stock and brembo mod. I also have the Spiegler line.
Sean, I had issues with compression on my brembo caliper as well. I actually walked away from it and came back to it the next day due to simply not getting it to function properly and frustration setting in. I set the caliper up on a box so the line was elevated thinking it might help the bubbles work their way up. When I came back the next day, I just kept bleeding and adding fluid until I felt it worked properly. I'm still not convinced it works as well as my stock caliper ever did.
Are you bleeding off the bike, or on the bike. I put a piece of wood in between the pads as recommended by another forum member, and bled off the bike/rotor.
I recently purchased the Spiegler speed bleeders hoping this will improve efficiency in the process. Bleeding my brakes is my least favorite job to do on this bike.
netty, was it you that mentioned you had a leak? That could be your problem. I still haven't measured that banjo bolt for you....sorry....will get to it though. My entire garaged is just currently under plastic due to redoing the ceiling.
I had trouble getting the air out of the rear brake line on my last bike when I put a new line on it, so I removed the caliper from it's mount and left it in an elevated position over night hoping that air would travel toward the bleed port.
In the morning I place a piece of timber between the pads like netty mentioned and bleed the system with the caliper still in the elevated position and the air got removed.
Give that a go if your still having no luck.
In the morning I place a piece of timber between the pads like netty mentioned and bleed the system with the caliper still in the elevated position and the air got removed.
Give that a go if your still having no luck.
sparky300
Well-known member
When you guys say "elevated" you mean with the bleeder at 12 o'clock position right?
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