The 2025 Calendar Voting is now live! Click here to vote!
Front ABS Random activation.
- 0face
- Contributor
- Veteran
- Posts: 3786
- Joined: Wed Jan 16, 2013 4:30 pm
- FJRModel: 2008
- Location: Chandler, AZ
- x 3362
- x 5552
Front ABS Random activation.
I put new pads on before I left on this trip. All good for over a thousand miles.
Now, when applying front brake the ABS randomly starts thumping, not all the time, randomly, release and sometime goes away, pump it a couple times then it goes away for sure. Then it randomly comes back during braking. There doesn’t seem to be any particular reason. Fast, slow, light application, hard application. It also goes away if I tap the rear brake while it’s doing it.
Cursory Inspection show the pads in the their place correctly, and the sensor lines up correctly. We did kill about a billion grasshoppers and it seems to have started after that. I find it coincidental tho I don’t think a bug could cause that
Front brake was a little squishy when we just stopped for lunch. Kind of like when you put tires on and then pump them up. Then it was fine.
No visible fluid leaks.
Thoughts?
Now, when applying front brake the ABS randomly starts thumping, not all the time, randomly, release and sometime goes away, pump it a couple times then it goes away for sure. Then it randomly comes back during braking. There doesn’t seem to be any particular reason. Fast, slow, light application, hard application. It also goes away if I tap the rear brake while it’s doing it.
Cursory Inspection show the pads in the their place correctly, and the sensor lines up correctly. We did kill about a billion grasshoppers and it seems to have started after that. I find it coincidental tho I don’t think a bug could cause that
Front brake was a little squishy when we just stopped for lunch. Kind of like when you put tires on and then pump them up. Then it was fine.
No visible fluid leaks.
Thoughts?
-
- Contributor
- I post more than I ride
- Posts: 20430
- Joined: Wed Jan 16, 2013 6:10 pm
- FJRModel: 2013-Jwilly Special LD Delivery
- Location: Travelers Rest
- x 43748
- x 18939
Re: Front ABS Random activation.
You parked your bike tooooo close to a BMW??
Madmudder loved this
boatanchor, 3rd class.
- FJRoss
- Veteran
- Posts: 2678
- Joined: Sat Apr 14, 2018 7:41 pm
- FJRModel: 2011 FJR 1300
2017 BMW F700GS - Location: Fredericton NB (Canada)
- x 815
- x 2399
Re: Front ABS Random activation.
Front or rear rotors getting hot? Wonder if you have a brake dragging due to a crudded up pivot?
Other than that, I would pull the sensors and make sure they are clean. Good luck.
Other than that, I would pull the sensors and make sure they are clean. Good luck.
wheatonFJR loved this
-
- Contributor
- I post more than I ride
- Posts: 20430
- Joined: Wed Jan 16, 2013 6:10 pm
- FJRModel: 2013-Jwilly Special LD Delivery
- Location: Travelers Rest
- x 43748
- x 18939
Re: Front ABS Random activation.
What are the symptoms of a master cylinder failure? I have no idea about wtf is up with the ABS, but if you've recently flushed the fluid, have no leaks and have a squishy pedal/lever...that's what would be in the back of my non-mechanical mind. That and that your bike is one of those weirdo Black FJRs parked WAY too close to a BMW.
boatanchor, 3rd class.
- raYzerman
- Contributor
- I post more than I ride
- Posts: 9675
- Joined: Mon Mar 18, 2013 10:49 am
- FJRModel: 2010 Honda CBF1000FA
- Location: Millgrove, Ontario, CA
- x 3129
- x 11582
Re: Front ABS Random activation.
Haven't heard of this exact symptom... kinda sounds like one sensor is telling the ABS ECU the wheel isn't turning (or turning slower than the other one) while braking, then it kicks in the ABS. I can only think dirty sensor or trigger wheel, or less so, faulty sensor. I'd inspect for bug guts and give them a wee wipe. Could also have corrosion (white flakes) on the sensor (from the adapter hole it goes in), for now wipe down and later some silicone/dielectric grease. Most conditions should just turn the ABS light on or flashing, not actually kick in the ABS.
Keep yer stick on the ice........... (Red Green)
Duct tape can't fix stupid, but it can sure muffle the sound.
Duct tape can't fix stupid, but it can sure muffle the sound.
- gitbox
- Casual Rider
- Posts: 73
- Joined: Wed Nov 02, 2016 9:36 am
- FJRModel: 2008 FJR1300A
- Location: Maryland's Eastern Shore
- x 31
- x 74
Re: Front ABS Random activation.
Maybe a pad (or pads) separated from the backing. I've Seen that before with cheap replacements. Look up rust jacking brakes.
Just a thought.
Just a thought.
2008 Yamaha FJR1300A
2004 Yamaha FJR1300 (sold)
2000 Kawasaki Concours (sold)
...etc.
2004 Yamaha FJR1300 (sold)
2000 Kawasaki Concours (sold)
...etc.
- Intech
- I'm Not Back
- Veteran
- Posts: 2630
- Joined: Thu Jan 17, 2013 10:35 am
- FJRModel: 2015
- Location: Virginia
- x 1251
- x 2984
Re: Front ABS Random activation.
I would go with pulling the sensor and making sure it is clean. If it is partially crudded up that could cause a intermittent sensing that the wheel isn't turning. Are you just applying the rear brake alone when it goes away? If so, then it is just looking at the rear sensor, so I would think that still points to the front sensor.
jwilly and Bugnatr loved this
RIP BeemerDonS JSNS
RIP Petey
RIP jwilly
RIP 1911
-
- Veteran
- Posts: 3073
- Joined: Sat Mar 09, 2013 1:16 am
- FJRModel: 2014 SuperTanker1200. 2018 DCT Hippo,
2007 KLR650... the Goldwing of thumpers - Location: Northwest Peardale, Ca
- x 6153
- x 6028
Re: Front ABS Random activation.
I know a guy with a shop in La Pine.
jwilly loved this
It's too deep, this is a bike not a canoe.
-
- Contributor
- I post more than I ride
- Posts: 20430
- Joined: Wed Jan 16, 2013 6:10 pm
- FJRModel: 2013-Jwilly Special LD Delivery
- Location: Travelers Rest
- x 43748
- x 18939
Re: Front ABS Random activation.
I heard he only works on Kawasakis and Beemers...
boatanchor, 3rd class.
-
- Veteran
- Posts: 3073
- Joined: Sat Mar 09, 2013 1:16 am
- FJRModel: 2014 SuperTanker1200. 2018 DCT Hippo,
2007 KLR650... the Goldwing of thumpers - Location: Northwest Peardale, Ca
- x 6153
- x 6028
Re: Front ABS Random activation.
That's for the retired guys with WAY to much time and money.
It's too deep, this is a bike not a canoe.
- 0face
- Contributor
- Veteran
- Posts: 3786
- Joined: Wed Jan 16, 2013 4:30 pm
- FJRModel: 2008
- Location: Chandler, AZ
- x 3362
- x 5552
-
- Contributor
- I post more than I ride
- Posts: 20430
- Joined: Wed Jan 16, 2013 6:10 pm
- FJRModel: 2013-Jwilly Special LD Delivery
- Location: Travelers Rest
- x 43748
- x 18939
- 0face
- Contributor
- Veteran
- Posts: 3786
- Joined: Wed Jan 16, 2013 4:30 pm
- FJRModel: 2008
- Location: Chandler, AZ
- x 3362
- x 5552
Re: Front ABS Random activation.
Ummmm...I think I found the problem.
Loose Caliper. f@$king moron didn’t torque the bolts enough.
Loose Caliper. f@$king moron didn’t torque the bolts enough.
wheatonFJR, Bugnatr, and jwilly loved this
- raYzerman
- Contributor
- I post more than I ride
- Posts: 9675
- Joined: Mon Mar 18, 2013 10:49 am
- FJRModel: 2010 Honda CBF1000FA
- Location: Millgrove, Ontario, CA
- x 3129
- x 11582
Re: Front ABS Random activation.
Dayum! He's fired!
wheatonFJR and Bugnatr loved this
Keep yer stick on the ice........... (Red Green)
Duct tape can't fix stupid, but it can sure muffle the sound.
Duct tape can't fix stupid, but it can sure muffle the sound.
-
- Contributor
- I post more than I ride
- Posts: 20430
- Joined: Wed Jan 16, 2013 6:10 pm
- FJRModel: 2013-Jwilly Special LD Delivery
- Location: Travelers Rest
- x 43748
- x 18939
Re: Front ABS Random activation.
Wadda Maroon!
You gonna wait till Lapine to fix dat?
EDIT: Hey, there would seem to be a straight forward fix for that. But that's just me.
You gonna wait till Lapine to fix dat?
EDIT: Hey, there would seem to be a straight forward fix for that. But that's just me.
Last edited by wheatonFJR on Thu Sep 05, 2019 9:02 am, edited 1 time in total.
boatanchor, 3rd class.
- extrememarine
- HMFIC
- I post more than I ride
- Posts: 6872
- Joined: Sun Jan 13, 2013 12:17 pm
- FJRModel: 2009 FJR
- Location: SE Michigan
- x 2086
- x 13152
- Contact:
Re: Front ABS Random activation.
This should be nominated for a "Post of the year" contest...
Ride There!
-Wayne aka asphalt surfer...
IBA#60836
#Peteyismyhero & #JWillywashere
-Wayne aka asphalt surfer...
IBA#60836
#Peteyismyhero & #JWillywashere
- bill lumberg
- Contributor
- Veteran
- Posts: 2630
- Joined: Tue Jun 30, 2015 1:03 pm
- FJRModel: 2018ES/2022ES
- x 4058
- x 4497
- Contact:
Re: Front ABS Random activation.
Way cool. I’ve heard of floating rotors. But floating calipers is some next level shit.
Madmudder, jwilly, and wheatonFJR loved this
#boatanchorsmatter
2022ES
2022ES
- griff
- Veteran
- Posts: 722
- Joined: Fri Jan 18, 2013 11:42 pm
- FJRModel: 2014 ES
- Location: Greer, SC
- x 263
- x 756
Re: Front ABS Random activation.
Jeez, throttle cables coming loose under the tank, missing caliper bolts. What's next?
-
- Contributor
- I post more than I ride
- Posts: 20430
- Joined: Wed Jan 16, 2013 6:10 pm
- FJRModel: 2013-Jwilly Special LD Delivery
- Location: Travelers Rest
- x 43748
- x 18939
Re: Front ABS Random activation.
All joshing aside, I'm glad you found it before bad stuff started happening.
boatanchor, 3rd class.
- FJRoss
- Veteran
- Posts: 2678
- Joined: Sat Apr 14, 2018 7:41 pm
- FJRModel: 2011 FJR 1300
2017 BMW F700GS - Location: Fredericton NB (Canada)
- x 815
- x 2399