HUM from front end

13-05-2012, 06:02 PM

hi all,

I seem to be sufferig from a humming noise from the front of my m600, its done 14K miles and had a new set of bridgestones on just before i bought it.

nothing seems loose or stiff, braking doesn't alter the noise, only speed. also seems to be a very light vibration that can be felt at the bars.

any suggestions? wheel bearing perhaps or is it possible I'm just hearing the tyre on the tarmac?

if it requires some stripping, anyone got a link to show how the front wheel is removed?

Thanks.

13-05-2012, 07:21 PM

is it a low hum or high pitched hum? are the tyres soft? could be youre hearing them on the road, check for wiggle in the wheel bearing if you can too.

13-05-2012, 07:30 PM

its a bit like a high pitched buzz, when brakig from 30+mph on my mountain bike it makes the same noise

thats with 8 inch discs and sintered pads, but braking makes no diff to this noise.

I can't feel any movement in the wheel

Nickj · 13-05-2012, 08:36 PM

Tinnitus??

Might just be the brakes, one piston might not be moving as much as it should, that'd do it

utopia · 14-05-2012, 03:04 AM

My 750 suddenly developed a buzz from the front when I had a pair of michelin PR2s fitted.
It had been quiet on the original tyres (metzelers ?)
It had only done 3000m or so at the time so the bearings would have been fine.
I put it down to road noise from the new tyre.
I guess I should've had the wheel out to check that everything had been done correctly, but the tyres were fitted by a local "bikes only" supplier and I trusted their work. To be honest, I can't remember whether I did or not now, but its been the same for 7000m now, including two mot tests.
So yes, I think it could be coming from the tyre itself, though I've not heard of any other reports of this from anyone else. I haven't really asked though.
Thats not to say that it is....just that its a feasible possibility.
Might be worth raising the front and slackening the spindle clamps, then reclamping it following the recommended procedure.
Obviously you'd check for bearing play while the wheel was off the ground too.
And that all fastenings on disc/s and calipers were tight (though I note that you say the noise is independant of braking, so they're an unlikely culprit, but not impossible).
A haynes manual for the 2-valve range is worth the money.

gary tompkins · 14-05-2012, 08:18 AM

Check pads are not rubbing or binding on front disc

May give similar whirring noise you get from floating disc under braking

Martin C · 15-05-2012, 04:41 PM

Quote:

Originally Posted by DLowe

hi all,

I seem to be sufferig from a humming noise from the front of my m600, its done 14K miles and had a new set of bridgestones on just before i bought it.

nothing seems loose or stiff, braking doesn't alter the noise, only speed. also seems to be a very light vibration that can be felt at the bars.

any suggestions? wheel bearing perhaps or is it possible I'm just hearing the tyre on the tarmac?

if it requires some stripping, anyone got a link to show how the front wheel is removed?

Thanks.

It sounds rather like front wheel bearing/s to me - they can become worn & noisy without noticeable play developing. Raise the front wheel off the ground, carefully lever all of the pads back slightly, and spin the wheel as fast as possible by hand to check for the noise. (Naturally, it helps if you have a centre-stand fitted, as I do!) If it is the wheel bearings, replacement isn't a difficult job.

19-05-2012, 08:30 AM

cool, thanks for the info..... not ridden the bike since as its been popetually pissing it down, but will try get a better look with the wheel in the air.

anyone got any tips on how to raise the front wheel without a paddock stand or similar?

I have plenty of car gear but oly just starting with bikes, so need to lift with trolley jacks/ axle stands if possible?

ta

23-06-2012, 12:38 PM

well after lifting the front, checking it all etc.....

found the problem and its now fixed - It was the worn chain and sprockets vibrating through the frame, new ones fitted by DK yesterday - all good and smooth now

13-05-2012, 06:02 PM	#1
DLowe Guest Posts: n/a	HUM from front end hi all, I seem to be sufferig from a humming noise from the front of my m600, its done 14K miles and had a new set of bridgestones on just before i bought it. nothing seems loose or stiff, braking doesn't alter the noise, only speed. also seems to be a very light vibration that can be felt at the bars. any suggestions? wheel bearing perhaps or is it possible I'm just hearing the tyre on the tarmac? if it requires some stripping, anyone got a link to show how the front wheel is removed? Thanks.

13-05-2012, 08:36 PM	#4
Nickj Too much time on my hands member Join Date: Jun 2007 Location: Forest Of Dean Bike: S2r Posts: 3,196	Tinnitus?? Might just be the brakes, one piston might not be moving as much as it should, that'd do it __________________ "The final measure of any rider's skill is the inverse ratio of his preferred Traveling Speed to the number of bad scars on his body." Song of the sausage creature

14-05-2012, 08:18 AM	#6
gary tompkins 1/2 man - 1/2 pogo-stick Join Date: Aug 2002 Location: Dartford, Kent Bike: M900ie Posts: 7,241	Check pads are not rubbing or binding on front disc May give similar whirring noise you get from floating disc under braking __________________ GT Fully paid up member of the S.A.S. (Scottoiler Appreciation Society) 27,000 miles on original chain - and still going strong!

13-05-2012, 07:21 PM	#2
don_matese Guest Posts: n/a	is it a low hum or high pitched hum? are the tyres soft? could be youre hearing them on the road, check for wiggle in the wheel bearing if you can too.

13-05-2012, 07:30 PM	#3
DLowe Guest Posts: n/a	its a bit like a high pitched buzz, when brakig from 30+mph on my mountain bike it makes the same noise thats with 8 inch discs and sintered pads, but braking makes no diff to this noise. I can't feel any movement in the wheel

14-05-2012, 03:04 AM	#5
utopia No turn left unstoned Join Date: Jun 2010 Location: leicester Bike: M750 Posts: 4,546	My 750 suddenly developed a buzz from the front when I had a pair of michelin PR2s fitted. It had been quiet on the original tyres (metzelers ?) It had only done 3000m or so at the time so the bearings would have been fine. I put it down to road noise from the new tyre. I guess I should've had the wheel out to check that everything had been done correctly, but the tyres were fitted by a local "bikes only" supplier and I trusted their work. To be honest, I can't remember whether I did or not now, but its been the same for 7000m now, including two mot tests. So yes, I think it could be coming from the tyre itself, though I've not heard of any other reports of this from anyone else. I haven't really asked though. Thats not to say that it is....just that its a feasible possibility. Might be worth raising the front and slackening the spindle clamps, then reclamping it following the recommended procedure. Obviously you'd check for bearing play while the wheel was off the ground too. And that all fastenings on disc/s and calipers were tight (though I note that you say the noise is independant of braking, so they're an unlikely culprit, but not impossible). A haynes manual for the 2-valve range is worth the money.

19-05-2012, 08:30 AM	#8
DLowe Guest Posts: n/a	cool, thanks for the info..... not ridden the bike since as its been popetually pissing it down, but will try get a better look with the wheel in the air. anyone got any tips on how to raise the front wheel without a paddock stand or similar? I have plenty of car gear but oly just starting with bikes, so need to lift with trolley jacks/ axle stands if possible? ta

23-06-2012, 12:38 PM	#9
DLowe Guest Posts: n/a	well after lifting the front, checking it all etc..... found the problem and its now fixed - It was the worn chain and sprockets vibrating through the frame, new ones fitted by DK yesterday - all good and smooth now