Any advice on rub sound from front tire

pastordavid · 08-06-2008, 01:52 AM

Just started riding my Longo LB200 and it sounds like something is rubbing in the front. 4 of us looked and could not see anything. We drove slowly passed each other and still could not tell what it was. We are now thinking that it must be the brake shoes rubbing on discs but there is no marking...

Anyone else experience this funky phenomenon?

Again, Visual and audio does not give any insight...

Thanks!
David

Oh ya, We did install the front tire ourselves as this was a rabbitscooter.com purchase.

katoranger · 08-06-2008, 07:57 AM

Is it more of a chirp sound? I am leaning toward the brake pads. The rotor may have a slight bend in it.

Allen

IronFist · 08-06-2008, 09:00 AM

Rubber or metal rubbing sound??????

Describe the sound.

pastordavid · 08-06-2008, 02:57 PM

It's not a chirp. It sounds more like a metal rub such as woo woo... I think that is how you spell woo woo...

IronFist · 08-06-2008, 04:06 PM

Can you get the bike up on a milk crate pastor dave. If you can, secure the bike the best you can, and spin the front wheel. You should be able to isolate the sound with no road noise. It might be the disk, if it is bleed out the old brake fluid and use dot 4(correct me if I'm wrong on the dot 4 folks.)

If its a cable rubbing then re-route it.
if it's your bearings you'll have to pull the axel and grease it up.

That's all I got for an errant WooWoo/

maf119l · 08-06-2008, 07:01 PM

Might try putting it up on a crate like ironfist said then take a black magic marker and mark the brake rotor then spin it and see if it shows wear signs.
P.S. mark both sides of the rotor.

IronFist · 08-06-2008, 11:23 PM

Thanks maf, that's a great tip too.

maf119l · 08-07-2008, 09:13 AM

The reason i suggest both sides of the rotor is if it's bent it could show rubbing in one or more spots on the same side and if its the wheel bent or out of line it should show marks in two places,one opposite and on the reverse side as the other.Atleast thats my thinking.And it's a cheap and easy procedure.

Cal25 · 08-07-2008, 09:23 AM

Might also be the outer edge of the rotor. The brake pads on my bike over rode the outer edge of the rotor just a bit causeing an intermittant rubbing. The magic marker sounds like a good idea.

IronFist · 08-07-2008, 09:45 AM

Quote:

Originally Posted by Cal25

Might also be the outer edge of the rotor. The brake pads on my bike over rode the outer edge of the rotor just a bit causeing an intermittant rubbing. The magic marker sounds like a good idea.

Right on Cal!
Pastor, Kato was the first to notice that on some bikes the break pads don't fit correctly on the disk, especially front. They overlap the disk, and after a while, the top edge of the pads need to be filed, or the breaks will squeek.

In the sun, or with a flashlight look at the way the pads clasp the disk. The face of the pads should be completely touching the disk. If the pads are higher than the disk, the pads won't wear correctly. Not a big worry early in a bike's life. Just needs maintainance. Let me know if I'm not being clear and you don't know what to look for.

katoranger · 08-07-2008, 01:57 PM

That wasn't me. I think it was Q who posted about that.

Allen

IronFist · 08-07-2008, 05:41 PM

Q?
My bad, Sorry to the original finder of the quirk. It was a good find.

Let me know if you need a pic, Pastor?

katoranger · 08-07-2008, 06:38 PM

I don't want to take credit for something I didn't do.

That is not likely the problem either since the bike is new.

Allen

glenski · 08-07-2008, 07:05 PM

I too am experiencing a similar sound as of these last couple of days. It certainly is a brake rub and I have heard about the need to trim down the pads. I think I am going to go out right now and lubricate the pins and see if this helps the caliper "float" better.

IronFist · 08-07-2008, 07:39 PM

When you pull the pads, make sure that the side that touches the disk is flat. If it has a lip, you can file it flat. After I did that my squeek went away, for a while...

My break pads sat higher than the disk, and the pads didn't wear evenly.

08-06-2008, 01:52 AM	#1
pastordavid Join Date: Aug 2008 Location: Skagit Valley, Washington Posts: 6	Any advice on rub sound from front tire Just started riding my Longo LB200 and it sounds like something is rubbing in the front. 4 of us looked and could not see anything. We drove slowly passed each other and still could not tell what it was. We are now thinking that it must be the brake shoes rubbing on discs but there is no marking... Anyone else experience this funky phenomenon? Again, Visual and audio does not give any insight... Thanks! David Oh ya, We did install the front tire ourselves as this was a rabbitscooter.com purchase. __________________ To know Jesus Christ, and To make Him known, This is my purpose.
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08-06-2008, 07:57 AM	#2
katoranger Join Date: May 2007 Location: Altamont, Kansas Posts: 15,103	Is it more of a chirp sound? I am leaning toward the brake pads. The rotor may have a slight bend in it. Allen __________________ You meet the nicest people on a Honda Clone.
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08-06-2008, 02:57 PM	#4
pastordavid Join Date: Aug 2008 Location: Skagit Valley, Washington Posts: 6	It's not a chirp. It sounds more like a metal rub such as woo woo... I think that is how you spell woo woo... __________________ To know Jesus Christ, and To make Him known, This is my purpose.
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08-06-2008, 04:06 PM	#5
IronFist Join Date: Apr 2007 Location: Toronto Ontario Canada Posts: 2,585	Can you get the bike up on a milk crate pastor dave. If you can, secure the bike the best you can, and spin the front wheel. You should be able to isolate the sound with no road noise. It might be the disk, if it is bleed out the old brake fluid and use dot 4(correct me if I'm wrong on the dot 4 folks.) If its a cable rubbing then re-route it. if it's your bearings you'll have to pull the axel and grease it up. That's all I got for an errant WooWoo/ __________________ IronFist ___________________________________ The "chain" of command is used for beating spammers. ___________________________________
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08-06-2008, 07:01 PM	#6
maf119l Join Date: Aug 2006 Location: perkinston,ms Posts: 296	Might try putting it up on a crate like ironfist said then take a black magic marker and mark the brake rotor then spin it and see if it shows wear signs. P.S. mark both sides of the rotor. __________________ yamaha vstar 650,unknown chinese 4 wheeler,johnny pag 250 spyder,lifan gy-5
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08-06-2008, 09:00 AM	#3
IronFist Join Date: Apr 2007 Location: Toronto Ontario Canada Posts: 2,585	Rubber or metal rubbing sound?????? Describe the sound.
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08-06-2008, 11:23 PM	#7
IronFist Join Date: Apr 2007 Location: Toronto Ontario Canada Posts: 2,585	Thanks maf, that's a great tip too.
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08-07-2008, 09:13 AM	#8
maf119l Join Date: Aug 2006 Location: perkinston,ms Posts: 296	The reason i suggest both sides of the rotor is if it's bent it could show rubbing in one or more spots on the same side and if its the wheel bent or out of line it should show marks in two places,one opposite and on the reverse side as the other.Atleast thats my thinking.And it's a cheap and easy procedure. __________________ yamaha vstar 650,unknown chinese 4 wheeler,johnny pag 250 spyder,lifan gy-5
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08-07-2008, 09:23 AM	#9
Cal25 Join Date: Feb 2008 Location: Terrell and Grapevine Tx. Posts: 1,585	Might also be the outer edge of the rotor. The brake pads on my bike over rode the outer edge of the rotor just a bit causeing an intermittant rubbing. The magic marker sounds like a good idea.
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08-07-2008, 01:57 PM	#11
katoranger Join Date: May 2007 Location: Altamont, Kansas Posts: 15,103	That wasn't me. I think it was Q who posted about that. Allen __________________ You meet the nicest people on a Honda Clone.
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08-07-2008, 05:41 PM	#12
IronFist Join Date: Apr 2007 Location: Toronto Ontario Canada Posts: 2,585	Q? My bad, Sorry to the original finder of the quirk. It was a good find. Let me know if you need a pic, Pastor? __________________ IronFist ___________________________________ The "chain" of command is used for beating spammers. ___________________________________
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08-07-2008, 06:38 PM	#13
katoranger Join Date: May 2007 Location: Altamont, Kansas Posts: 15,103	I don't want to take credit for something I didn't do. That is not likely the problem either since the bike is new. Allen __________________ You meet the nicest people on a Honda Clone.
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08-07-2008, 07:05 PM	#14
glenski Join Date: Apr 2008 Posts: 103	I too am experiencing a similar sound as of these last couple of days. It certainly is a brake rub and I have heard about the need to trim down the pads. I think I am going to go out right now and lubricate the pins and see if this helps the caliper "float" better.
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08-07-2008, 07:39 PM	#15
IronFist Join Date: Apr 2007 Location: Toronto Ontario Canada Posts: 2,585	When you pull the pads, make sure that the side that touches the disk is flat. If it has a lip, you can file it flat. After I did that my squeek went away, for a while... My break pads sat higher than the disk, and the pads didn't wear evenly. __________________ IronFist ___________________________________ The "chain" of command is used for beating spammers. ___________________________________
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