- Ciao Guest - You’ve landed at the ultimate Guzzi site. NEW FORUM REGISTRATIONS REQUIRE EMAIL ACTIVATION - CHECK YOUR SPAM FOLDER - Use the CONTACT above if you need help. New to the forum? For all new members, we require ONE post in the Introductions section at the bottom, in order to post in most of the other sections. ALWAYS TRY A SEARCH BEFORE STARTING A NEW TOPIC - Most questions you may have, have likely been already answered. DON'T BE A DRIVE-BY POSTER: As a common courtesy, check back in and reply within 24 hours, or your post will be deleted. Note there's decades of heavily experienced Guzzi professionals on this site, all whom happily give endless amounts of their VALUABLE time for free; BE COURTEOUS AND RESPECTFUL!
- Be sure to see the GTM STORE link also above for our 700+ product inventory, including OEM parts and many of our 100% Made-in-SoCal-USA GTM products and engine kits. In SoCal? Click the SERVICE tab above for the best in service, tires, tuning and installation of our products or custom work, and don't miss our GT MotoCycles® (not) art on the BUILDS tab above. WE'RE HERE ONLINE ONLY - NO PHONE CALLS MADE OR RECEIVED - DO NOT EMAIL AND ASK QUESTIONS OR ASK TO CALL YOU.
- There is ZERO tolerance on personal attacks and ANY HYPERLINKS to PRODUCT(S) or other competing website(s), including personal pages, social media or other Forums. This ALSO INCLUDES ECU DIAGnostic software, questions and mapping. We work very hard to offer commercially supported products and to keep info relevant here. First offense is a note, second is a warning, third time will get you banned from the site. We don't have the time to chase repeat (and ignorant) offenders. This is NOT a social media platform; It's an ad-free, privately funded website, in small help with user donations. Be sure to see the GTM STORE link above; ALL product purchases help support the site, or you can upgrade your Forum profile or DONATE via the link above.
Brake rotor pulsing - resolved
- Thread starterncassidy
- Start date
Re: brake rotor ?
I have no doubt that some disks are truly warping, but some may be just suffering from buttons locking up or uneven pad deposits. I have not had any issues with mine and I sometimes use them quite hard, but as a rule I am not a heavy braking guy on the street.
I have no doubt that some disks are truly warping, but some may be just suffering from buttons locking up or uneven pad deposits. I have not had any issues with mine and I sometimes use them quite hard, but as a rule I am not a heavy braking guy on the street.
Re: Re:brake rotor ?
Do you see the hammer on the right side of the picture? Use one to strike the rivets to open up the gap. Mark where you start and get each in turn.
greg said:GrahamNZ said:Chuck in Indiana wrote:
so what exactly are you doing in this picture to "loosen the rivets"?
Do you see the hammer on the right side of the picture? Use one to strike the rivets to open up the gap. Mark where you start and get each in turn.
Re: brake rotor ?
How loose should they be? Can you rotate them with your fingers?
How loose should they be? Can you rotate them with your fingers?
xenarchi
Tuned and Synch'ed
- Joined
- Oct 29, 2008
- Messages
- 99
- Reaction score
- 1
Re: brake rotor ?
the more my brakes pulse the harder i grab them. been doing it since the bike was new. figured fuck it, don't care. she stills stops good.
she is due for a big service after the winter. maybe I'll give the pads recommended above a try.
the more my brakes pulse the harder i grab them. been doing it since the bike was new. figured fuck it, don't care. she stills stops good.
she is due for a big service after the winter. maybe I'll give the pads recommended above a try.
Re: brake rotor ?
Ha, they say great minds think alike...... :shock: I have been doing exactly the same, the bike stops on a dime so who cares if there is a bit of a shudder.
PS: yeah yeah yeah I know - fools seldom differ as well, but hey I'm happy.
Ha, they say great minds think alike...... :shock: I have been doing exactly the same, the bike stops on a dime so who cares if there is a bit of a shudder.
PS: yeah yeah yeah I know - fools seldom differ as well, but hey I'm happy.
loftyjohn
Cruisin' Guzzisti
Re: brake rotor ?
HA HA
Me too
Ride it like you nicked it and use the brakes in the same manner :lol:
Loftyjohn
HA HA
Me too
Ride it like you nicked it and use the brakes in the same manner :lol:
Loftyjohn
Roblatt
High Miler
Re: brake rotor ?
Me too!
Me too!
Re: brake rotor ?
I've got a few guzzi's, all the same brakes. Ride mostly too fast, and brake too hard, lots of hills and hard braking, no pulsing on any of them. the bikes have between 8K and 35K miles of the same style of riding. I had a number of japanese bikes warp rotors, but the guzzi's dont seem to for me. I use EBC HH pads, never wash the suckers, never do anything except replace the pads. I wonder if there any correlation between flatlanders (indiana Chuck) and hill/mountain riding.
I've got a few guzzi's, all the same brakes. Ride mostly too fast, and brake too hard, lots of hills and hard braking, no pulsing on any of them. the bikes have between 8K and 35K miles of the same style of riding. I had a number of japanese bikes warp rotors, but the guzzi's dont seem to for me. I use EBC HH pads, never wash the suckers, never do anything except replace the pads. I wonder if there any correlation between flatlanders (indiana Chuck) and hill/mountain riding.
Re: brake rotor ?
There is. The harder you use the brakes, the less likely the chance of the pulsing. Hard braking keeps the rotor buttons moving, so no problems with a pulsing brake. When mine started to pulse, I found some good downhill runs and did some heavy braking to get thing moving freely. No pulsing since.
guzzi jon said:
There is. The harder you use the brakes, the less likely the chance of the pulsing. Hard braking keeps the rotor buttons moving, so no problems with a pulsing brake. When mine started to pulse, I found some good downhill runs and did some heavy braking to get thing moving freely. No pulsing since.
GrahamNZ
High Miler
Re: brake rotor ?
Ever since loosening the rotor mountings a squillion kiloclickeroons ago the brakes on my Breva are like silk. Smooth, sensitive and strong. And, yes, I am a hard braker. Brevas are more satisfying when being braked hard than when being accelerated hard. By comparison Buells are the opposite..........Brake hard and often is THE MESSAGE.
Ever since loosening the rotor mountings a squillion kiloclickeroons ago the brakes on my Breva are like silk. Smooth, sensitive and strong. And, yes, I am a hard braker. Brevas are more satisfying when being braked hard than when being accelerated hard. By comparison Buells are the opposite..........Brake hard and often is THE MESSAGE.
bruce_perler
Just got it firing!
Re: brake rotor ?
My two cents ...
Bought a 2007 B11 in Seattle this September and took it on a long trip south along the Oregon / California coast (lots of turns and hills). Within 1000 miles the front brakes began to pulse - brake harder and they pulsed harder. Warped rotor(s) must have been the cause. I had the rotors replaced at the break in service about 2000 miles ago and they've been fine ever since. Given the number of posts on this topic, Brembo must have had some manufacturing problems in the rotors - speculation of course.
My two cents ...
Bought a 2007 B11 in Seattle this September and took it on a long trip south along the Oregon / California coast (lots of turns and hills). Within 1000 miles the front brakes began to pulse - brake harder and they pulsed harder. Warped rotor(s) must have been the cause. I had the rotors replaced at the break in service about 2000 miles ago and they've been fine ever since. Given the number of posts on this topic, Brembo must have had some manufacturing problems in the rotors - speculation of course.
Re: brake rotor ?
Agreed. When my brakes started pulsing, it was after 2 days of riding in the rain in Nova Scotia.
john zibell said:
Agreed. When my brakes started pulsing, it was after 2 days of riding in the rain in Nova Scotia.
GrahamNZ
High Miler
Re: brake rotor ?
Frequent hard braking has several advantages:
It ensures that the brake is working at its best.
It helps the rider to learn the brakes' capabilities and how to stop quickly in an emergency.
It prevents pad-material buildup on the discs, which gentle-use-only can cause, giving the impression of warped rotors.
If helps keep the mounting rivets from siezing, impeding rotors from being semi-floating and self-aligning. As above.
Truly warped rotors are rare - unless you own a Buell with a ZTL front brake........
Frequent hard braking has several advantages:
It ensures that the brake is working at its best.
It helps the rider to learn the brakes' capabilities and how to stop quickly in an emergency.
It prevents pad-material buildup on the discs, which gentle-use-only can cause, giving the impression of warped rotors.
If helps keep the mounting rivets from siezing, impeding rotors from being semi-floating and self-aligning. As above.
Truly warped rotors are rare - unless you own a Buell with a ZTL front brake........
Re: Re:brake rotor ?
Graham
Mine started pulsing (noticible at low brake pressures). Tried cleaning the discs and a dose of heavy braking but still there - not a safety issue as utimately I can stop fast when required but very annoying when slowing smoothly in traffic.
I already tried some gentle persuasion of the rivets while the discs are still fitted to the wheel. It created some movement where before there was none. However the pulsing hasnt gone and i'm guessing i didnt loosen them enough. Exactly how much "easing" did you give them rivets with that heavy hammer ? I looks like you attacked them from the back side (
) is that just for for ease of mounting the discs/rotors on your jig or so the rivets fit in the sockets used?
If further easying of the rivets fails to cure it i will try your dial setup and see if it is down to warped disc or discs, though as you say this should be unlikely. My B11 is non-ABS and In my view the option of ABS means the discs specified should have been thoroughly tested to the limits when the ABS was tested so shouldnt be prone to warping.
Art
GrahamNZ said:Chuck in Indiana wrote:
Agreed. Some of you may remember an old post of mine where I showed how I dialled the discs and loosened the rivets. Many km later I'd rate my Breva's brakes as one of its strongest points.
IMHO very few discs are truly warped, but many suffer from the rivets being too tight and not allowing the discs to be semi-floating as designed, and many suffer from pad material impregnation though not getting enough regular hard use.
Of course, discs can become truly warped and common causes are;
Being bumped, especially during tyre changing.
Trying to ride off with a disc lock in place.
Parking a bike while the discs are extremely hot, although this is rarely an issue with road bikes.
Initial brake jerkiness on a bike which was parked wet can be just localised surface rust where the pads have been. Yes, SS does rust slightly.
For new members, here is the info again.
Measuring for runout
All good here
Good here too.
But the rivets were too tight. Loosening them cured the problems completely.
Graham
Mine started pulsing (noticible at low brake pressures). Tried cleaning the discs and a dose of heavy braking but still there - not a safety issue as utimately I can stop fast when required but very annoying when slowing smoothly in traffic.
I already tried some gentle persuasion of the rivets while the discs are still fitted to the wheel. It created some movement where before there was none. However the pulsing hasnt gone and i'm guessing i didnt loosen them enough. Exactly how much "easing" did you give them rivets with that heavy hammer ? I looks like you attacked them from the back side (
) is that just for for ease of mounting the discs/rotors on your jig or so the rivets fit in the sockets used? If further easying of the rivets fails to cure it i will try your dial setup and see if it is down to warped disc or discs, though as you say this should be unlikely. My B11 is non-ABS and In my view the option of ABS means the discs specified should have been thoroughly tested to the limits when the ABS was tested so shouldnt be prone to warping.
Art
Roblatt
High Miler
Re: brake rotor ?
Art,
my B11 had the same symptoms as yours, annoying pulse at slow speed. Heavy breaking did cure mine, but it took a couple of weeks with constant heavy braking to cure the symptoms. If you only did it once or twice,, keep it up for a while just to try and save yourself some fiddling.
Robert
Art,
my B11 had the same symptoms as yours, annoying pulse at slow speed. Heavy breaking did cure mine, but it took a couple of weeks with constant heavy braking to cure the symptoms. If you only did it once or twice,, keep it up for a while just to try and save yourself some fiddling.
Robert