Strange noise when I am accelerating

[nobrakes]

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.

[fazersharp]

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.

FRONT SPROCKET NUT LOOSE. search the forum here for info do not ride until you have investigated

[nobrakes]

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.

FRONT SPROCKET NUT LOOSE. search the forum here for info do not ride until you have investigated

Just checked it. Was not loose. The back wheel seems also be alligned. Must be something else

[nobrakes]

Just found the problem 

[His Dudeness]

Am I seeing three damaged rollers?

[BBROWN1664]

could be a stiff link or two on the chain

[darrsi]

could be a stiff link or two on the chain

 
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.

[His Dudeness]

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.

[darrsi]

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.

[His Dudeness]

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.

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.

[darrsi]

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.

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.

Surely though even if just one roller broke it would be REALLY noticeable every time it touched a sprocket?

[His Dudeness]

You'd think so wouldn't you We'll have to wait and see what he says.

[Fazerider]

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.