New front tire=spongy brakes - Harley Davidson Forums: Harley Davidson Motorcycle Forum
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post #1 of 11 (permalink) Old 06-19-2017, 07:09 AM Thread Starter
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New front tire=spongy brakes

So I R&R front wheel to have new tire mounted and balanced.
Remove calipers and wire them up to frame, reassemble without any issues and now the front brake lever needs 2 pulls to get hard.
Once it's hard it stays hard.
What did I screw up?
TIA
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post #2 of 11 (permalink) Old 06-19-2017, 07:18 AM
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Must have spread the pads at some point, brake needs to be bled now.

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post #3 of 11 (permalink) Old 06-19-2017, 07:24 AM
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Check your master cylinder level , it may be a little low. Also try zip tying your brake lever to the throttle grip, firmly but not super tight for 24 hours.

Other wise you will need to bleed them.

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post #4 of 11 (permalink) Old 06-19-2017, 07:49 AM Thread Starter
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Originally Posted by SCHMIDTY View Post
Must have spread the pads at some point, brake needs to be bled now.
Yes I did move them in slightly. Never would have thought that would have had such a dramatic effect.
I'm do for a flush anyway.
Thanks for the info.

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post #5 of 11 (permalink) Old 06-19-2017, 07:50 AM Thread Starter
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Originally Posted by 67Duce View Post
Check your master cylinder level , it may be a little low. Also try zip tying your brake lever to the throttle grip, firmly but not super tight for 24 hours.

Other wise you will need to bleed them.
I'll give that a whirl tonight to see if it helps
Thanks

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post #6 of 11 (permalink) Old 06-19-2017, 08:16 AM
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If your brakes use DOT 3 or 4 have a squirt bottle of water to flush any brake fluid off of painted parts.

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post #7 of 11 (permalink) Old 06-19-2017, 08:34 AM
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I'm do for a flush anyway.
Thanks for the info.
One of the reasons for flushing brake fluid , DOT 3 & 4 , is it absorbs moisture over time causing sponginess , rust , and corrosion. Same with open bottles on the shelf.

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post #8 of 11 (permalink) Old 06-19-2017, 09:31 AM Thread Starter
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If your brakes use DOT 3 or 4 have a squirt bottle of water to flush any brake fluid off of painted parts.
Yup brake fluid is nasty stuff.


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One of the reasons for flushing brake fluid , DOT 3 & 4 , is it absorbs moisture over time causing sponginess , rust , and corrosion. Same with open bottles on the shelf.
I never leave brake fluid of any kind on shelf. When I'm done with it.....gets tossed right away.
Any way I won't have to mess with it. Bike has ABS so to the shop it goes where they have the "fancy HD bleeder dohickey".
On another note, when it comes time to change pads and the pistons need to be pushed in to allow for full thickness pads I guess I will need to make another trip to the mechanic?

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post #9 of 11 (permalink) Old 06-19-2017, 10:15 AM
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Yup brake fluid is nasty stuff.



I never leave brake fluid of any kind on shelf. When I'm done with it.....gets tossed right away.
Any way I won't have to mess with it. Bike has ABS so to the shop it goes where they have the "fancy HD bleeder dohickey".
On another note, when it comes time to change pads and the pistons need to be pushed in to allow for full thickness pads I guess I will need to make another trip to the mechanic?
Not necessarily, in fact you may not need to bleed now. use them for a few good around town days,( when you use the brakes a lot) and the problem may very well go away. Sometimes when the pads are depressed, the dust covers "hold" the pistons back and dont regain their shape until used more than a few times. After being used the dust covers regain their shape and allow the pistons to return to the proper distance from rotors. But if it's time for flushing, that will take care of it as well.
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post #10 of 11 (permalink) Old 06-19-2017, 12:10 PM
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Not necessarily, in fact you may not need to bleed now. use them for a few good around town days,( when you use the brakes a lot) and the problem may very well go away. Sometimes when the pads are depressed, the dust covers "hold" the pistons back and dont regain their shape until used more than a few times. After being used the dust covers regain their shape and allow the pistons to return to the proper distance from rotors. But if it's time for flushing, that will take care of it as well.
I was going to say that also. Same thing happened to me after a recent front tire change. Couple days later, no issue.

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