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› Front rotor rubbing on caliper mount
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Front rotor rubbing on caliper mount (Read 71 times)
BlakieG
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Front rotor rubbing on caliper mount
11/09/21 at 20:36:29
Hey all. Thanks for the add. Just got a new to me 2014 S40 that only has 180 miles on it. Was out for a ride and heard some metal on metal rubbing in the front wheel. Realized that the rotor is rubbing directly on the caliper mount. Brake works fine and the pads and caliper look good. Wondering if this is a common issue or if I just have a bad rotor.
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badwolf
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Re: Front rotor rubbing on caliper mount
Reply #1 -
11/09/21 at 20:46:35
Is it rubbing on the outside of the rotor, or are the pads rubbing?
If the rotor is rubbing on the caliper mount, the axle spacer(s) are messed up.
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Fast 650
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Re: Front rotor rubbing on caliper mount
Reply #2 -
11/09/21 at 21:52:31
Sure sounds like your axle spacers are swapped left to right. It is easy to mix them up, more than a few people have done that before.
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verslagen1
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Re: Front rotor rubbing on caliper mount
Reply #3 -
11/09/21 at 22:11:14
Both spacers have a sheet metal shield that covers the bearings.
The spacer on the disk side has a flange that goes against the fork.
Also, the caliper bolts have 2 washers for each bolt.
Some adjustment can be achieved by placing 1 or both between the fork and caliper.
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Dave
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Re: Front rotor rubbing on caliper mount
Reply #4 -
11/10/21 at 02:02:50
That is a really clean hand you have.
My hands haven't been that clean for several decades!
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ohiomoto
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Re: Front rotor rubbing on caliper mount
Reply #5 -
11/10/21 at 17:51:01
Axle spacers.
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BlakieG
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Re: Front rotor rubbing on caliper mount
Reply #6 -
11/23/21 at 02:52:35
So finally got the bike up on a lift and spun the front tire. Found that about 35% of the rotor is rubbing on the caliper mount so I suspect a warped rotor over axel spacers. Ordered a new one so will see if that corrects the issue. Thank you to all for your suggestions. I'm hoping to get a few more rides in this year before winter consumes South Dakota.
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Gary_in_NJ
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Re: Front rotor rubbing on caliper mount
Reply #7 -
11/23/21 at 04:22:57
A warped rotor is unlikely. If the bike is still on the lift, I’d remove the caliper and check for side-to-side motion of the front wheel. I suspect worn wheel bearings over a warped rotor. The brakes on the S40 just don’t have enough power to warp a rotor.
If I did suspect a warped rotor, I would use a dial gauge to check the rotor, not a simple spin of the wheel.
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«
Last Edit: 11/23/21 at 11:10:11 by Gary_in_NJ
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Re: Front rotor rubbing on caliper mount
Reply #8 -
11/23/21 at 09:34:18
Gary, I have seen one of the older 4 speeds that had a warped rotor. It wasn't warped real bad, but enough to make hard braking unpredictable.
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