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+--- Thread: Strange noise when I am accelerating (/showthread.php?tid=78803)
Strange noise when I am accelerating - nobrakes - 15-09-17
Hi guys!
Couple of days ago i noticed some strange things.
When I am accelerating i can hear some knocking from the area around the front sprocket (no throttle no sound). I can even feel the knocking on my left foot.
Tried to loose the chain and adjusted to the recommended slack.
What is that noise, Im getting worried. :\
Re: Strange noise when I am accelerating - fazersharp - 15-09-17
(15-09-17, 04:58 PM)nobrakes link Wrote: Hi guys!FRONT SPROCKET NUT LOOSE. search the forum here for info do not ride until you have investigated
Couple of days ago i noticed some strange things.
When I am accelerating i can hear some knocking from the area around the front sprocket (no throttle no sound). I can even feel the knocking on my left foot.
Tried to loose the chain and adjusted to the recommended slack.
What is that noise, Im getting worried. :\
Re: Strange noise when I am accelerating - nobrakes - 15-09-17
(15-09-17, 05:12 PM)fazersharp link Wrote: [quote author=nobrakes link=topic=23268.msg268149#msg268149 date=1505491105]FRONT SPROCKET NUT LOOSE. search the forum here for info do not ride until you have investigated
Hi guys!
Couple of days ago i noticed some strange things.
When I am accelerating i can hear some knocking from the area around the front sprocket (no throttle no sound). I can even feel the knocking on my left foot.
Tried to loose the chain and adjusted to the recommended slack.
What is that noise, Im getting worried. :\
[/quote]
Just checked it. Was not loose. The back wheel seems also be alligned. Must be something else
Re: Strange noise when I am accelerating - nobrakes - 15-09-17
Just found the problem :o
![[Image: 21754448_10159318356655174_20644128_n.jp...e=59BEDF22]](https://scontent-arn2-1.xx.fbcdn.net/v/t34.0-12/21754448_10159318356655174_20644128_n.jpg?oh=353d743dfb9a48f3a96d45ab09a2bc3d&oe=59BEDF22)
Re: Strange noise when I am accelerating - His Dudeness - 15-09-17
Am I seeing three damaged rollers?
Re: Strange noise when I am accelerating - BBROWN1664 - 15-09-17
could be a stiff link or two on the chain
Re: Strange noise when I am accelerating - darrsi - 15-09-17
(15-09-17, 05:58 PM)BBROWN1664 link Wrote: could be a stiff link or two on the chain
:agree
Highly likely to be stiff chain links, caused by not maintaining/lubing enough, that just rust over time.
Not sure what i'm s'posed to be looking at in the photo, but if you look at the lower part of the chain from the side, stiff links will not be totally horizontal, they'll be at a slight angle.
Even one stiff link can cause the knocking on the left foot.
Chances are you're gonna need a new chain & sprocket set.
Re: Strange noise when I am accelerating - His Dudeness - 16-09-17
Maybe it's just the picture but look at the bottom of the second from the top link and the two links below that. The rollers look skinnier than the top roller. It looks like the bottom of the rollers are broken off
Also the rollers that I think are broken are more rusted in colour. The ones that have been free to spin are shiny.
Re: Strange noise when I am accelerating - darrsi - 16-09-17
(16-09-17, 12:06 PM)His Dudeness link Wrote: Maybe it's just the picture but look at the bottom of the second from the top link and the two links below that. The rollers look skinnier than the top roller. It looks like the bottom of the rollers are broken off
Also the rollers that I think are broken are more rusted in colour. The ones that have been free to spin are shiny.
Maybe, but it is hard to tell from the photo.
Does all look rather dry though.
Re: Strange noise when I am accelerating - His Dudeness - 16-09-17
(16-09-17, 01:49 PM)darrsi link Wrote: [quote author=His Dudeness link=topic=23268.msg268195#msg268195 date=1505559984]
Maybe it's just the picture but look at the bottom of the second from the top link and the two links below that. The rollers look skinnier than the top roller. It looks like the bottom of the rollers are broken off
Also the rollers that I think are broken are more rusted in colour. The ones that have been free to spin are shiny.
Maybe, but it is hard to tell from the photo.
Does all look rather dry though.
[/quote]
Yeah a lack of lube was probably the problem. I've never seen rollers seize and break. I wonder how many miles are on the chain it doesn't look that old. Hopefully he clarifies what's happened.
Re: Strange noise when I am accelerating - darrsi - 16-09-17
(16-09-17, 02:04 PM)His Dudeness link Wrote: [quote author=darrsi link=topic=23268.msg268196#msg268196 date=1505566181]
[quote author=His Dudeness link=topic=23268.msg268195#msg268195 date=1505559984]
Maybe it's just the picture but look at the bottom of the second from the top link and the two links below that. The rollers look skinnier than the top roller. It looks like the bottom of the rollers are broken off
Also the rollers that I think are broken are more rusted in colour. The ones that have been free to spin are shiny.
Maybe, but it is hard to tell from the photo.
Does all look rather dry though.
[/quote]
Yeah a lack of lube was probably the problem. I've never seen rollers seize and break. I wonder how many miles are on the chain it doesn't look that old. Hopefully he clarifies what's happened.
[/quote]
Surely though even if just one roller broke it would be REALLY noticeable every time it touched a sprocket?
Re: Strange noise when I am accelerating - His Dudeness - 16-09-17
You'd think so wouldn't you :lol We'll have to wait and see what he says.
Re: Strange noise when I am accelerating - Fazerider - 16-09-17
I’ve had it happen. It’s just a mild knocking under acceleration (though it was only two missing rollers in my case) and it took quite a careful inspection before I spotted where the problem was.
As for what caused it, I’m usually pretty careful about keeping the chain lubed, this was before fitting a Scottoiler, but the other rollers seemed free enough. A small stone caught between chain and sprocket might have been the start… with a roller gone the next will get a harder impact each time it hits a tooth because the spacing between links doesn’t match that of the teeth.