abs , shudder, or chatter
Thread Starter
|
Cruiser
Joined: Mar 2011
Posts: 228
Likes: 1
abs , shudder, or chatter
Guys, I have a 09 EGS the rear brake seems to pulse or chatter when comming to a stop regardless of brake pressure....The front, I can feel cycle under heavy braking, but as I said when coming to a stop using the rear, I get a chatter that feels like running over a wash board road...is this normal?
Outstanding HDF Member
Joined: Oct 2008
Posts: 2,981
Likes: 48
From: Northern Illinois
Guys, I have a 09 EGS the rear brake seems to pulse or chatter when comming to a stop regardless of brake pressure....The front, I can feel cycle under heavy braking, but as I said when coming to a stop using the rear, I get a chatter that feels like running over a wash board road...is this normal?
Under hard braking, you might get some ABS chatter, but IMO, it shouldn't do it all the time.
Extreme HDF Member
Joined: Sep 2010
Posts: 14,744
Likes: 402
From: Phoenix '53, '88, '09 Big Twins
a warped disc will pulse back through the pedal. it'll be speed dependent
discs are warped when overheated, like riding the brake on a long mtn descent.
most warped discs you can see by lifting the rear of the bike until the wheel is clear, then spinning it, you can see from the rear or use a stationary pencil or gauge to show the run out
mike
discs are warped when overheated, like riding the brake on a long mtn descent.
most warped discs you can see by lifting the rear of the bike until the wheel is clear, then spinning it, you can see from the rear or use a stationary pencil or gauge to show the run out
mike
Grand HDF Member
Joined: May 2008
Posts: 4,585
Likes: 673
From: Rolla
Guys, I have a 09 EGS the rear brake seems to pulse or chatter when comming to a stop regardless of brake pressure....The front, I can feel cycle under heavy braking, but as I said when coming to a stop using the rear, I get a chatter that feels like running over a wash board road...is this normal?
No, it's not normal.
My '09 Street Glide does not do that.
Is it possible that you are in fact using enough pressure on the rear brake to lock up the rear wheel (even for an instant)?
If so, then it would be possible to get that shudder/chatter/pulsing that you are describing.
Also, not sure how experienced you are at riding. But it's very easy to lock up the rear wheel on a bike. In hard braking, all the weight gets transferred to the front.
Remember, ABS will prevent the rear wheel from locking up. It does this by rapidly pulsing the brake pressure.
If you you already know this isn't what is causing your issue, then forgive me for bringing it up.
There have been more than a few posts of others experiencing really sensitive ABS function on these bikes.
If you come up to a stop sign/light on the fast side, and brake hard with a washboard type road surface, its very possible to experience what you describe.
Thread Starter
|
Cruiser
Joined: Mar 2011
Posts: 228
Likes: 1
Well it is not a warped disc, I am well aware of weight shift etc, and the abs does work, as I can initiate a full bore rear braking event and not lock up the rear, but I still get the chatter at low speed coming to a stop....Any more ideas...
Outstanding HDF Member
Joined: Jul 2010
Posts: 2,979
Likes: 57
From: PA
a warped disc will pulse back through the pedal. it'll be speed dependent
discs are warped when overheated, like riding the brake on a long mtn descent.
most warped discs you can see by lifting the rear of the bike until the wheel is clear, then spinning it, you can see from the rear or use a stationary pencil or gauge to show the run out
mike
discs are warped when overheated, like riding the brake on a long mtn descent.
most warped discs you can see by lifting the rear of the bike until the wheel is clear, then spinning it, you can see from the rear or use a stationary pencil or gauge to show the run out
mike
Road Master
Joined: Sep 2010
Posts: 836
Likes: 1
From: Rocky Hill, CT.
Trending Topics
Road Master
Joined: Feb 2005
Posts: 1,109
Likes: 3
From: Chattanooga, TN
Its not the brakes, Its the compensator slipping. My 08 SE3 did the same thing, replaced the compensator with the new SE compensator and no more chatter when braking or the big clunk when starting, smoother shifting and finding neutral is much easier.
HD Forum Stories
The Best of Harley-Davidson for Lifelong Riders
7 Surprising Harley-Davidson Products that Are Not Motorcycles
Verdad Gallardo
8 Best Harley-Davidson Motorcycles Ever
Pouria Savadkouei
10 Worst Harley-Davidson Motorcycles Ever
Pouria Savadkouei
Killer Custom's Jail Break Is The Breakout That Refused to Blend In
Verdad Gallardo
Crazy Bunderbike Build Looks Amazing, But Is It Impossible to Ride?
Verdad Gallardo
Harley-Davidson Reveals Super Cool Cafe Racer Concept
Verdad Gallardo
Engraved Rebellion: Inside Bundnerbike's Glam Rock II
Verdad Gallardo
10 Motorcycles You Should Never Buy
Joe Kucinski
10 Things Harley-Davidson Needs to Fix in 2026
Verdad Gallardo
Road Warrior
Joined: Oct 2008
Posts: 1,692
Likes: 22
From: Denham Springs, La
As I'm coming to a stop I let off my front brake and keep pressure on my rear brake. It's smooth as silk until the last few feet. That's when I get the chatter. I don't think it's ABS or a warped rotor because it's constant from the time it starts til I'm stopped. Mine only does it 2 up.
It feels like the pads and rotor are metal to metal but the pads aren't worn out. There's no squealing or any other noise. I've changed my rear pads 2 times (stock Harley) and it's no different. I think it's a vibration set up between the pads and caliper. It's never caused any problem other than the "chatter". I just quit worrying about it.
It feels like the pads and rotor are metal to metal but the pads aren't worn out. There's no squealing or any other noise. I've changed my rear pads 2 times (stock Harley) and it's no different. I think it's a vibration set up between the pads and caliper. It's never caused any problem other than the "chatter". I just quit worrying about it.
Road Warrior
Joined: Feb 2009
Posts: 1,727
Likes: 11
From: TN
Chances are it is just an engine vibration you are feeling at low speed and low rpm. Engage and disengage the clutch as it is decelerating, if that shuddering stops it is just engine vibration. Ask me how I know.
Bwana
Bwana