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New Chain, KMC X11SL jumping off lower pulley

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New Chain, KMC X11SL jumping off lower pulley

Old 06-01-15, 07:17 PM
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blackbox
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New Chain, KMC X11SL jumping off lower pulley

Hello, I have no idea what I screwed up.

Trying to learn and be my own mechanic, I replaced the old Dura Ace chain on my Sram Red22 groupset. I bought the groupset used and it came with the DA chain. I liked the gold color and heard that the KMC chain (X11SL) lasted longer so I went with that.

I did the big/big measurement with out connecting to the RD and added 1.5 links.
Installed it, and test shifted, I have no problem with all 11 gears in the rear when on the small ring. When I shifted to the big ring, any of the gear other then the smallest 3 in the rear, the chain would jump off the lower pulley (the one closer to the ground). I then double check the new and old chain and they have the same amount of links(54).

Anyone able to tell me what could cause this?
The new KMC X11SL came with a very stick wax like coasting, after this happen, I added some dry lube hoping it would make a difference, it didn't...

Btw, if it makes a difference, it jumps to the outside.

Last edited by blackbox; 06-01-15 at 07:42 PM.
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Old 06-01-15, 07:28 PM
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My best guess from past experience is that the chain is too short.
Shift it into the big/big combination, take a photo, then post it here.
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Old 06-01-15, 07:30 PM
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You might need to set your min and max settings on your rear mec. If you look at the chain from behind, you want the jockey wheels to line up with the lowest(highest) gear, if not. Adjust your limiter so that it lines up perfectly. You might also be able to make this adjustment with just using your barrel adjuster at the cable.
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Old 06-01-15, 07:42 PM
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is the chain routed correctly?
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Old 06-01-15, 07:48 PM
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Originally Posted by redlude97 View Post
is the chain routed correctly?
Yeah, is it inside the retainer tabs on the derailleur body?
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Old 06-01-15, 07:57 PM
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https://flic.kr/p/tZc1bc

https://flic.kr/p/tGsSYq

Sorry for just posting the link, I am trying to figure out how to post this.

Last edited by blackbox; 06-01-15 at 08:05 PM.
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Old 06-01-15, 08:02 PM
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Originally Posted by blackbox View Post
fify
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Old 06-01-15, 08:06 PM
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[IMG]<a href="https://www.flickr.com/photos/130764452@N02/18368819831" title="20150601_214842 by kin mak, on Flickr"><img src="https://c1.staticflickr.com/1/530/18368819831_23e7965734_z.jpg" width="640" height="480" alt="20150601_214842"></a>[/IMG]

https://<a href="https://www.flickr.c...1_214842"></a>




Ok... How do you post pics from Flickr?

Last edited by blackbox; 06-01-15 at 09:05 PM.
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Old 06-01-15, 08:08 PM
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Originally Posted by Shimagnolo View Post
fify
I didn;t know what "Fify" meant, so I googled it and I got this...

FIFY
Fify stands for ' Fit in (a) few years'

When used in a sentence : "That girl is a Fify".

Applies to all girls under the age of 16. when you see a hot girl that is possibly younger then the age of 16 then the word "Fify" is a short term saying for telling someone that a girl is going to be hot when she turns 16. "Fify" is a simple descriptive word of a young girl that a man may find sexually attractive but simply can't state she is fit because she is too young. The word is socially acceptable because when using the word "Fify", a man is basically acknowledging that the female is too young to be called fit and so instead of coming across as a pedophile, a man can use this word with safety because it clearly sates that the female will be hot when she turns the legal age of 16.

LMAO
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Old 06-01-15, 08:11 PM
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Check for stiff links and check the wheel is seated in the drop outs properly.
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Old 06-01-15, 08:12 PM
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I'm guessing you need an extra link or two and a new user name.
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Old 06-01-15, 08:16 PM
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Originally Posted by trailflow1 View Post
Check for stiff links and check the wheel is seated in the drop outs properly.
Just re-seated the Rear Wheel, still the same...
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Old 06-01-15, 08:19 PM
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Originally Posted by black_box View Post
I'm guessing you need an extra link or two and a new user name.
Sorry about the User name
If my chain is too short, am I basicly done with this chain?
Can I add more using another link connector?
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Old 06-01-15, 08:20 PM
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I thought it meant fixed it for you.
anyway, is your missing link completely pulled into position?
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Old 06-01-15, 08:21 PM
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Originally Posted by nastystang View Post
I thought it meant fixed it for you.
anyway, is your missing link completely pulled into position?
The 2nd search result was "Fix it for you," first result was the one I posted.
Just thought it was kind of funny.

The Missing link is fully locked.
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Old 06-01-15, 08:26 PM
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Remove the chain and check the jockey wheel doesn't rock side to side. Then check the jockey wheel isn't warped /twisted or has any bent teeth.

Also check the jockey wheel bolts are tightened.

Last edited by trailflow1; 06-01-15 at 08:31 PM.
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Old 06-01-15, 08:32 PM
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The problem is you are trying to use the "img" tag where you needed a "url" tag.
Click "reply with quote" on my post, and you will see.

Contrary to popular myth, slack in the chain on the small/small combo is not a problem.
(See image).
Those 3x10 gears work great in every combination.

I would say the chain is too short. As the lower pulley gets pulled forward, it moves out of the plane of the chain, and the chain may get pulled off the side of the lower pulley.

If you have the links you removed, you can use an additional master link to add them to the chain.
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Old 06-01-15, 08:32 PM
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Originally Posted by trailflow1 View Post
Remove the chain and check the jockey wheel doesn't rock side to side. Then check the jockey wheel isn't warped /twisted or has any bent teeth.

Also check the jockey wheel bolts are tightened.
I will have to check that tomorrow, but based on the links to the photos above, is the chain length and routing ok?
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Old 06-01-15, 08:37 PM
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To me, the chain length looks ok.

Another thing you should look at is the b-screw adjustment. Top jockey wheel might be too close (or too far) to the cassette.
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Old 06-01-15, 08:40 PM
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If the length of your older chain worked, why did you remeasure? I guess that doesn't matter at this point (smile).

How do their lengths compare? Did you make the new one appreciably shorter?
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Old 06-01-15, 08:50 PM
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Since it works on the small ring on all gears neither the chain nor the limit screws are an issue.

Since it jumps off the bottom pulley the B-Limit screw is not an issue as it would primarily affect the top pulley.

Since it jumps off as you move up the cassette, and to the outside I would look at chainline (have you changed crank/BB lately?) or, most likely, a bent RR Der hanger.
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Old 06-01-15, 09:09 PM
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I noticed the jockey wheels are not original Sram Red. How old are they ? Maybe they have worn and meshed with the old chain.

I would try new jockey wheels if the problem persists.
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Old 06-01-15, 09:10 PM
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Originally Posted by Bob Dopolina View Post
Since it works on the small ring on all gears neither the chain nor the limit screws are an issue.

Since it jumps off the bottom pulley the B-Limit screw is not an issue as it would primarily affect the top pulley.

Since it jumps off as you move up the cassette, and to the outside I would look at chainline (have you changed crank/BB lately?) or, most likely, a bent RR Der hanger.

The bike was build last month, using the current parts.
Nothing was changed and shifted fine before the new chain, and a bike wash.
Since the groupset was used, the original pulleys was a bit worn and I got the aerozine pulley as it was ligther, color match, and a lot cheaper. Really regret this, the bottom pulley has some side to side play. Will switch back to the original pulleys tomorrow and try again.

Edit: The blue pulley in this picture is maybe 300kms old, fairly new.
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Old 06-01-15, 09:13 PM
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Are you testing in the bike stand by pedaling backwards?
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Old 06-01-15, 09:19 PM
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Originally Posted by 2manybikes View Post
Are you testing in the bike stand by pedaling backwards?
Not sure if this information helps, I had the chain dropped in the front a few times back pedaling at a stop, aligning the pedal for when the lights turn green. This was when I had the old chain.

The bike was originally tuned by a fairly reputable Cervelo dealer in Toronto, so i am hoping they did the chain line correctly.

I tested this on the bike stand pedaling forward, when I get to the 3rd or 4th biggest gear in the back with the big ring in the front. I can't even turn a few links before it jumps off the pulley with the new chain.
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