Sprocket barely rubbing against chain guide rubber?

z71will
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206
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Pinson, AL US
10/30/2017 3:05pm Edited Date/Time 11/1/2017 8:34pm
It's barely hitting when I have the bike on the stand to wear you can hear it go 'tss tss tss tss' when I spin the wheel. What's causing this and how do I fix it? 2001 cr125

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10/30/2017 3:40pm
Did you adjust the chain tension I had this probably once when I adjusted my chain and it's was cock eyed abit
ktm-5
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Ravenna, MI US
10/30/2017 3:44pm
Perhaps it got bent from a rock, root or just hard ground, I try to bend it out of the way just alittle
10/31/2017 6:11pm
It looks like the sprocket is cracked or has a defect ? If that is a crack maybe it's slightly bent causing it to rub.
z71will
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Pinson, AL US
10/31/2017 6:46pm
It looks like the sprocket is cracked or has a defect ? If that is a crack maybe it's slightly bent causing it to rub.
It's not cracked or bent it's brand new

The Shop

c0ncEpT
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5/13/2015
Location
Harrison Twp., MI US
10/31/2017 10:11pm
Either the chain guide is bent or the rear wheel isn't square.
Acidreamer
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8/25/2015
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Mansfield, OH US
11/1/2017 1:12am
Looks like the slot isnt wide enough for the sprocket. If its brand new and yor wheel is straight then just run it and let the new sprocket clear out the slot a bit.
omalley
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Snohomish, WA US
11/1/2017 7:40am
The top rear of that chain guide plastic should line up with the top of the aluminum guide housing. Either your housing is bent down or the inner guide is bent/deformed up. I would pull it off the bike and determine which. Unless you’re running a large sprocket there shouldn’t be any rubbing at the leading edge, when I put them back on, I also bend the rear ends of the inner guide out a little to preload them against the aluminum.
imoto34
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TN US
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11/1/2017 8:04am
Could you get a better photo of what appears to be a crack in that sprocket?
Acidreamer
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Mansfield, OH US
11/1/2017 8:28am
imoto34 wrote:
Could you get a better photo of what appears to be a crack in that sprocket?
That looks cracked af
z71will
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Pinson, AL US
11/1/2017 8:41am
Hey I just looked over the sprocket cause it did look cracked in the pic but it's not. It's just a molding mark and there's no cracks on it at all! Also the wheel is straight and has not bends or cracks at all. As for the rubbing it just barely rubs. And the teeth on the sprocket don't rub at all. The only rubbing is these things as shown in the picture below. It only rubs on the back rubber part.
z71will
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206
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6/4/2017
Location
Pinson, AL US
11/1/2017 8:54am Edited Date/Time 11/1/2017 8:55am
Also the sprocket is inside the guide evenly and straight, however it sits way over to one side while the other side has plenty of room. So basically the issue here is that for some reason it's sitting about 1 or 2 mm too far on one side. What would cause this and how would I fix it?
imoto34
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TN US
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11/1/2017 9:16am
z71will wrote:
Also the sprocket is inside the guide evenly and straight, however it sits way over to one side while the other side has plenty of room...
Also the sprocket is inside the guide evenly and straight, however it sits way over to one side while the other side has plenty of room. So basically the issue here is that for some reason it's sitting about 1 or 2 mm too far on one side. What would cause this and how would I fix it?
They are easily warped or bent in a crash. I would just try and get it a little more to your liking by hand and run it.
omalley
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Snohomish, WA US
11/1/2017 9:22am
imoto34 wrote:
Could you get a better photo of what appears to be a crack in that sprocket?
Acidreamer wrote:
That looks cracked af
That’s a stamped sprocket, not a machined/laser cut one. I’ve seen marks like that before, it’s where the metal shears in the stamping process.
Naanak
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625
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9/9/2014
Location
NJ US
11/1/2017 1:18pm
Happened on every Honda I've ever had. I safety wire both sides of the guides and if that doesn't work I'll file the guide where it rubs.
Hcallz5
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2821
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8/20/2013
Location
UT US
11/1/2017 8:34pm
Measure the adjustment on your axle blocks with a dial caliper to ensure your wheel is 100% straight. Could just need a good sanding down to make it so it doesn't rub.
c0ncEpT
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Harrison Twp., MI US
11/3/2017 9:04am
I'd bet the guide is bent. My 2012 Honda slipped off the ramp when unloading once. It just clipped the side of the ramp with the chain guide and bent it enough to rub. A rubber mallet was all I needed to re-square it.

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