Noise from front rotor
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Ultimate HDF Member
Joined: Nov 2007
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From: NJ
Noise from front rotor
Had my front wheel off for a few months over the winter while doing a chrome fork kit. Finally got it back together and everything seems okay except for a rotor hum or groan when riding at low speeds. I've cleaned the rotors with alcohol, sanded them down with 600 grit sandpaper, rode it for about 100 miles and can't get rid of the noise.
The noise stops when I apply the front brake so I'm fairly certain it's rotor related. But I didn't do anything to them when the caliber was off. It stayed on the wheel and never got any grease on it.
I don't think there's any mechanical problem and I think it'll go away after awhile but I'm curious to know if anyone has any shortcuts to speed up the process. Or knows exactly what causes it.
The noise stops when I apply the front brake so I'm fairly certain it's rotor related. But I didn't do anything to them when the caliber was off. It stayed on the wheel and never got any grease on it.
I don't think there's any mechanical problem and I think it'll go away after awhile but I'm curious to know if anyone has any shortcuts to speed up the process. Or knows exactly what causes it.
Road Master
Joined: Aug 2007
Posts: 1,049
Likes: 5
From: Emerald Coast, FL
Yep... clean your caliper pistons. My guess is that when you had the caliper off the rotor the calipers came out a hair and sat that way the entire time that you had the wheel off... there was most certainly a collection of dust etc that attached itself to the caliper pistons and the piston wants to stay in that set position.
Oh... the noise is the pad rubbing on the caliper... it will go away by cleaning the caliper pistons or when the pad wears down to where the caliper wants it to be.
Oh... the noise is the pad rubbing on the caliper... it will go away by cleaning the caliper pistons or when the pad wears down to where the caliper wants it to be.
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Ultimate HDF Member
Joined: Nov 2007
Posts: 6,975
Likes: 12
From: NJ
First plausible explanation I've heard for why the rotors would moan like they do. I'll put a few more miles on them and if it doesn't clear up I'll pull the calipers and give your suggestion a shot. Thanks.
Road Master
Joined: May 2009
Posts: 983
Likes: 4
From: Fredericksburg, Va
The brake pistons are the culprit most of the time but you also want to make sure the brake pad pin/bolt is well greased. ALso, make sure you didnt overfill the master solenoid because if you did then when the brake fluid heats up it will expand forcing the pistons out just a little enough to not allow them to retract. Good luck.
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