Front brake growl - Yamaha FJR Forum : Yamaha FJR Owners Forums
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post #1 of 11 (permalink) Old 06-15-2017, 04:37 PM Thread Starter
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Question Front brake growl

Hello all. I got around 1.2K miles on my 2016 and lately been noticing some odd sound and feel from the front brake. Usually it happens under moderate braking from 55+mph, i.e. when coming to a stop at the traffic light. The first few seconds of braking are normal, but then I sometimes hear a low growling noise from the front and vibration can be felt in the handlebars. Not like the pulsing from bent rotor, more like a buzz. When the speed drops down to around 20 mph it goes away. Reducing braking power also makes it go away. It doesn't happen every time I brake, so it's hard to troubleshoot it.. seems dependent on speed and braking power, but can't be 100% sure. Brake lever feels OK. Front tire was at 37 psi when I checked it couple days ago.
Has anyone experienced something like that?

2016 FJR1300A
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post #2 of 11 (permalink) Old 06-15-2017, 06:06 PM
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Several times. I've posted about it. I was once convinced it was the tire tread causing vibes. The last time I was more certain it felt like a lazy ABS that slowly tapered off...

Maybe it's the tire tread, but **** if it didn't have a clear impulse on the brake lever. I haven't seen anything odd on the rotors, calipers, or pads... ?

BTW, I can clearly hear and feel the front tread when leaning aggressively under 50 down to about 10, and this lever feedback is not the same...

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post #3 of 11 (permalink) Old 06-15-2017, 07:54 PM
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Maybe a tire tread pattern issue if the OEM BT023's. Air those up to 40 psi, 37 is way too low as an OEM recommendation. See what happens when you air it up. If you still get a vibe, try to determine if you feel it in the lever, i.e., ABS has been known to very lightly pulse/vibrate at low speeds (even though the ABS did not kick in as you were coasting with light braking).

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post #4 of 11 (permalink) Old 06-15-2017, 08:29 PM
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Could be you glazed the front rotors. Are they shiny? Smooth? Sometimes you can knock the glaze off with a few very hard braking stops. Can you take a picture and post it.

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post #5 of 11 (permalink) Old 06-15-2017, 08:59 PM Thread Starter
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Thanks for the replies guys.

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Originally Posted by mobilemike View Post
Could be you glazed the front rotors. Are they shiny? Smooth? Sometimes you can knock the glaze off with a few very hard braking stops. Can you take a picture and post it.
Actually had that thought on my way home today.. realized I haven't bedded in the brakes after I bought the bike. So I found a empty stretch of road and did few aggressive 60->20 mph slow downs using front brake until I start smelling it. Will pump up few PSI into the front tire and weather permitting do some riding on the weekend to see if there's any improvement. Will post the results.

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post #6 of 11 (permalink) Old 06-16-2017, 09:32 AM
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grease or oil or 'foreign' matter on discs or pads cam cause this, on such a new bike I wouldn't think it was that, but just a suggestion. Check for fork oil leaks or brake lines. Maybe who ever put it together had dirty hands. Maybe armour all or other cleaning stuffs. Or something completely different lol
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post #7 of 11 (permalink) Old 06-16-2017, 09:33 PM
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I have noticed this on my 16 as well, have about 4,500 miles on it and been noticing this very thing for about the last 1,000. Almost feels like the pads are catching in the slots or something, pretty disconcerting, I'll be following this one and hope to learn something
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post #8 of 11 (permalink) Old 06-17-2017, 07:31 AM
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I have a 2013 A model and mine has been doing the same thing . If I use the front brake pretty hard when I get to speed around 10 miles an hr an lower until stopped it will have a low growl and a vibration. It doesn't do it all the time
No leaks no dribbles, I'm following this as well hoping some one will have the answer I have had many questions answered here on this site Thanks
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post #9 of 11 (permalink) Old 06-17-2017, 12:41 PM
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One way to manually knock the glaze off a rotor is to scrub it with a circular pattern with a coarse scotch bright pad.

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post #10 of 11 (permalink) Old 06-18-2017, 06:35 AM
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16es here, feeling the same issue. have a tic under 10k on mine. not sure about a noise, but it's a strange catchy feeling
stem bearings packed and torqued. no change in tire replacement.

Following.

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