Author Topic: noise from the front (Read 3934 times)

Holmsey · « **on:** July 23, 2014, 20:50:43 »

Took Suzy to work today and heard this strange noise coming from the front. its difficult to describe but the closest I can suggest is like a rubbing sound from when you used to have a slightly buckled wheel on a bicycle and it used to rub on the brake block.

I know it a lot to ask from a very vague description but can you give me a place to start to in what to look at, it seems to disappear at speed.

Thanks in advance

Oop North John · « **Reply #1 on:** July 23, 2014, 20:56:12 »

Distorted front mudguard?

Something stuck between the mudguard and the wheel?

Discs warped?

Locky · « **Reply #2 on:** July 23, 2014, 21:01:07 »

Lift the front wheel and spin it by hand. Maybe a sticking caliper piston

Holmsey · « **Reply #3 on:** July 23, 2014, 21:14:59 »

Mudgaurd OK, nothing stuck.

Just lifted the front and spun the wheel it sounds as though the pads are constantly rubbing on the discs, I take it that's not normal.
On a positive the rubbing noise is constant which shows the discs are not warped I suppose

They are not stopping the wheel spinning as it sounds as they are barely touching.

Any advice

Mr Nick · « **Reply #4 on:** July 23, 2014, 21:18:37 »

They will sit pretty much in contact the whole time but you just don't normally hear them.

Maybe some grit got in beside the pads?

Holmsey · « **Reply #5 on:** July 23, 2014, 21:22:26 »

Quote from: "Mr Nick"

They will sit pretty much in contact the whole time but you just don't normally hear them.

Maybe some grit got in beside the pads?

without taking these things apart is there anything I can do .... blow it with air compressor etc.

krisv · « **Reply #6 on:** July 23, 2014, 21:42:34 »

Try some brake cleaner from halfrauds... Usually does the trick.. while you are at it, check if the discs are floating properly.

Holmsey · « **Reply #7 on:** July 23, 2014, 21:54:17 »

Quote from: "krisv"

Try some brake cleaner from halfrauds... Usually does the trick.. while you are at it, check if the discs are floating properly.

Cheers

But if the discs are made of metal won't they sink?

krisv · « **Reply #8 on:** July 23, 2014, 21:58:55 »

Quote from: "Holmsey"

But if the discs are made of metal won't they sink?

Ships are made of metal. They float most of the time.

I meant the bobbins on which the discs are monted. If one of them is stuck, there would be a slight run-out, causing the noise. I usually take a large bolt and nut, lock it in (not too tight) and rotate the bobbin a few times using a ratchet while spraying brake cleaner.

Holmsey · « **Reply #9 on:** July 23, 2014, 22:04:05 »

Quote from: "krisv"

Quote from: "Holmsey"
But if the discs are made of metal won't they sink?
::

Ships are made of metal. They float most of the time.

I meant the bobbins on which the discs are monted. If one of them is stuck, there would be a slight run-out, causing the noise. I usually take a large bolt and nut, lock it in (not too tight) and rotate the bobbin a few times using a ratchet while spraying brake cleaner.

ships are designed to displace water, the discs have holes in

In relation to the bobbins ...... Pretend your talking to a complete retard who hasn't got a clue :text-imnewhere: to biking ..... I can google it our ask a biker mate at work

Jacko · « **Reply #10 on:** July 23, 2014, 22:41:21 »

Pads rub against the discs on both my bikes, both audible when the wheel is spun, as long as it spins freely and doesn't come to a stop as soon as you've let go it's normal.

Regarding bobbin cleaning watch this vid.

krisv · « **Reply #11 on:** July 23, 2014, 23:01:41 »

You beat me to the link Jacko...

Quote from: "Holmsey"

hips are designed to displace water, the discs have holes in ::

I am at a loss for words now.. brains already shut down

Holmsey · « **Reply #12 on:** July 30, 2014, 18:34:00 »

Had a biker mate look at it and he says that thew bearings are fine but did notice a slight score line on one of the discs going around the centre. he reckons as previously said there maybe a stone on the disc.

I will have the pads off sometime on friday and take a butchers.

My mate loved Suzy and took her out for about an hour before reluctantly bringing her back

He used to have a V-Strom years ago and says he does regret getting rid of it but I think now he will be looking again

Any tips on taking the calipers off while I am here?.

Juvecu · « **Reply #13 on:** July 30, 2014, 21:21:03 »

It's a straight forward job, nothing much to it, not even when replacing them. Only tip perhaps is to not push the pistons in too far to make refitting easier, it might push fluid out the top at the master cylinder and brake fluid ruins paint if it's not washed off quickly. If it does spill out, just use lots of cold water to wash it away.

Jacko · « **Reply #14 on:** July 30, 2014, 22:12:36 »

Tips on taking the callipers off? Mate, if you f**k this up I'm coming down there to personally give you a slap. And I hate London!

Holmsey · « **Reply #15 on:** July 31, 2014, 06:27:26 »

Quote from: "Jacko"

Tips on taking the callipers off? Mate, if you f**k this up I'm coming down there to personally give you a slap. And I hate London!

Mmmmm threats of violence

although its a conditional threat it could be construed as a malicious communication (but an offence none the less)

You could always come to London and show me how not to F**k it up Jacko

Thank you Juvecu for the brake fluid spillage warning .... (see that's what I mean Jacko

)

Jacko · « **Reply #16 on:** July 31, 2014, 07:15:34 »

Pushing the pistons back is only really necessary if you're fitting new pads, you should be able to slide them off and then back on again without moving the pistons. I sometimes give a little twist of the caliper, after removing the bolts, when it's still on the disc to just create a slightly larger gap between the pads to facilitate refitting, it's not usually necessary though.

Holmsey · « **Reply #17 on:** July 31, 2014, 08:00:04 »

Quote from: "Jacko"

Pushing the pistons back is only really necessary if you're fitting new pads, you should be able to slide them off and then back on again without moving the pistons. I sometimes give a little twist of the caliper, after removing the bolts, when it's still on the disc to just create a slightly larger gap between the pads to facilitate refitting, it's not usually necessary though.

Cheers mate won't be replacing the pads so I'll take that on board

Oop North John · « **Reply #18 on:** July 31, 2014, 08:16:15 »

If you think you might push the pistons in too far, then removing some of the brake fluid from the reservoir stops it getting messy. I've used a syringe before to try and reduce the chances of splashing the paint work etc with the brake fluid. And, you might as well buy some new brake fluid in case it needs topping up, unless you already have some, but keep it closed as its hydroscopic.

To increase the ease of getting the caliper / brake pads back on I've used a screwdriver between the disc and the metal bit of the brake pad and gently twisted it a small amount. Though sometimes wobbling the caliper just to get the pads onto the disc can work as has been said, hopefully your discs don't have a lip on them which can make the job that bit more problematical.

Jacko · « **Reply #19 on:** July 31, 2014, 09:23:10 »

Quote from: "Holmsey"

Cheers mate won't be replacing the pads so I'll take that on board

My original post still applies.