Darth Vader Sound When I Apply Front Brake - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 26 (permalink) Old 09-12-2006, 05:25 PM Thread Starter
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Darth Vader Sound When I Apply Front Brake

Okay, I know that seems odd, but lately, when I apply the front brake, I get an initial sound like a Darth Vader exhale (only quieter). It's almost a rubbing sound, but not quite. Thinking that maybe I was down on the pad wearline, I pulled the calipers and checked - there's plenty of pad left. So I cleaned the pads with rubbing alcohol and also wiped down the rotors. It's better than it was, but there's still a Vader-link hint. Nothing else seems to be rubbing anything, anywhere (I double-checked the usable range on my rear brake, and it's fine as well). Any ideas? Aside from calling in Luke Skywalker to remove the problem?

Thanks.

C
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post #2 of 26 (permalink) Old 09-12-2006, 05:52 PM
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Really? Mine does something similar. Except mine sounds like, "Iamyerfatha..."

Sorry, couldn't resist. I have no clue, thought the same thing you thought. Maybe it will fade away...

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post #3 of 26 (permalink) Old 09-12-2006, 06:11 PM Thread Starter
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Ha ha. Now I know I'm of the right mindset for this bike. :-)

After I posted this, I started reading all the stuff on lubing the splines on the final drive, and now I'm thinking that maybe that's something I should've taken care of when I relocated my r/r (while the bike was fully out of service). Like, maybe Darth lives in my unlubed splines? That would make some kind of nasty <chhhhoooooooooooooo> sound, wouldn't it?

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post #4 of 26 (permalink) Old 09-12-2006, 06:18 PM
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More like a wwwooooffffttttt. Or a hhhooooobbbaaaahhhhhhhhh.

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post #5 of 26 (permalink) Old 09-12-2006, 06:23 PM Thread Starter
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hhhooooooooobaaaaaaaaaaaaaaaaaa. Kinda like if Darth had unlubed metal in his throat when he coughed. I actually intially thought "Huh. My rotors sound bad." But, like I say, the pads are absolutely fine.

hhhooooooooooobaaaaaaaaaaaaaaaaaaaa.

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post #6 of 26 (permalink) Old 09-13-2006, 04:22 AM
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Mine kind of does something like that once in awhile. And I know the pads are good too. I also know the rotors could stand to be cut or replaced.
Do your rotors have any roughness to them, or are they pretty smooth?
Also, does it seem to do it more as things start to heat up, like after using the front brake alot?


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post #7 of 26 (permalink) Old 09-13-2006, 07:27 AM Thread Starter
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I think it does seem to happen more when I've been out for a little while. I did check the rotors for rust, unevenness, warping, and for the most part they look fine. But the bike sat in some farmer's barn for years before the guy I bought it from took it under his wing. He (my seller) did a lot of work on the exhaust and electrical systems (they'd gotten crud from sitting), and no doubt he put new pads on, but the rotors appear to be original.

I should say, too, that initially I thought I was getting more of a "whup-whup-whup" sound when I applied the brakes (so I thought the rotors were warped), but that lasted about two days; now it's just a throaty sound, and it doesn't happen all the time.

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post #8 of 26 (permalink) Old 09-13-2006, 07:46 AM
 
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just a shot here but if its when you have been out for a while that it happens. Could it be that as the rotors heat up they do warp somewhat causing the noise then as they cool they straiten out and noise is gone.
or after rereading what I just said does that sound as weird to you as it now does me???
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post #9 of 26 (permalink) Old 09-13-2006, 02:35 PM
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Theres only one way to check for warp. Put a dial indicator (micrometer) on them. Trashlord - Yes that could happen.

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post #10 of 26 (permalink) Old 09-13-2006, 03:02 PM
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I thought warp made it go faster.
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