Explaining Chain Wear - Honda Rebel Forum
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post #1 of 37 Old 10-18-2018, 08:14 PM Thread Starter
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Explaining Chain Wear

See pictures below. Chain is a DID with about 4,500 miles on it. Sprockets were 14/33, and the rear sprocket was very badly worn. Any idea what caused some of the rollers to contact the sprocket teeth and be shiny while others didn't? I didn't see any pattern to the wear; there would be anywhere from one to four consecutive rollers that weren't making contact then a varying number that were, in no particular order.
Attached Images
File Type: jpg chain 001.jpg (114.5 KB, 12 views)
File Type: jpg chain 002.jpg (95.3 KB, 11 views)
File Type: jpg chain 004.jpg (121.8 KB, 16 views)

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post #2 of 37 Old 10-18-2018, 10:24 PM
 
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It appears from the pictures that the dull "rollers" are smaller diameter than the shiny ones. This is quite evident when you look at the gaps between adjacent shiny rollers and adjacent dull rollers.
I suspect that quite a number of the rollers have actually cracked and split off and the dull ones are actually the inner sleeve that the pin slides through and the rollers fit over when the chain is assembled. You can verify this by measuring diameter of the rollers. If you look at the end link in the bottom picture you can see that the "roller" is actually the inner sleeve that projects all the way through the side link with the same diameter.

This is a very unusual mode of failure for a D.I.D. chain since it would seem to indicate brittle rollers that could fail by cracking under heavy impacts from a worn sprocket. I would expect poor heat treatment from a cheap chain, but not from a good brand name like D.I.D.

There is evidence of rust around some of the O rings suggesting the pins are dry and rusty inside. How old was this chain? Was it maintained at all in 4500 miles?

This is a good argument for replacing chain and sprockets together.
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post #3 of 37 Old 10-18-2018, 11:27 PM Thread Starter
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New chain (EK brand) and JT sprockets installed this evening. Chain was cleaned and lubed every 500 miles. The chain is about 14 months old. There is no rust, just grime that accumulated since the last cleaning. You're right about the dull "rollers"; it's the inner sleeve and the outer part is gone.

Think I'll try and contact DID and see if they've had other reports of premature chain failure.

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post #4 of 37 Old 10-19-2018, 01:39 AM
 
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Quote:
Originally Posted by flitecontrol View Post
Think I'll try and contact DID and see if they've had other reports of premature chain failure.
It would probably be worth mentioning that you replaced it with a EK chain too (or at least just say "another brand")...drop a line about first impressions etc. After all, a standard el-cheap-o chain will go about 4K miles so why spend a lot more on their product?

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post #5 of 37 Old 10-19-2018, 11:49 AM Thread Starter
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I sent an email last night and was going to mention it would be my last D.I.D. chain if they didn't do the right thing, but decided not to. But that will definitely be part of the conversation if they tell me to pound sand.

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post #6 of 37 Old 10-19-2018, 12:33 PM
 
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Negative word of mouth in the age of internet forums is a terrible thing for reputable manufacturers. I have to say this is the first negative experience I have heard of with a D.I.D. chain and you can't unhear such a thing. Cracking and breaking of the rollers would seem to indicate faulty hardening of these components. The normal failure mode of a chain is worn out pins resulting in excessive "stretch" or elongation.

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post #7 of 37 Old 10-19-2018, 12:42 PM
 
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Do the teeth on the old sprockets show any unusual wear?

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post #8 of 37 Old 10-19-2018, 01:45 PM Thread Starter
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Quote:
Originally Posted by Duckster View Post
Negative word of mouth in the age of internet forums is a terrible thing for reputable manufacturers. I have to say this is the first negative experience I have heard of with a D.I.D. chain and you can't unhear such a thing. Cracking and breaking of the rollers would seem to indicate faulty hardening of these components. The normal failure mode of a chain is worn out pins resulting in excessive "stretch" or elongation.
I've used D.I.D. chains exclusively, and never had a problem with any of them until now. I got a lot of miles from all the others. I'm hoping they will replace the chain at no charge, in which case I will go back to using their brand.

The chain definitely stretched, but it wasn't due to a too tight chain. I run mine on the looser side.

Keepin' all the left over parts. Gonna use 'em to build another bike!

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post #9 of 37 Old 10-19-2018, 01:46 PM Thread Starter
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Do the teeth on the old sprockets show any unusual wear?
No, and I was looking for that, thinking I didn't have things properly aligned.

Keepin' all the left over parts. Gonna use 'em to build another bike!

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post #10 of 37 Old 10-19-2018, 04:55 PM Thread Starter
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Correspondence so far, mine in blue:

I have a D.ID. 520 O-ring chain that
wore out in less than 5,000 miles. It's less than 15 months old. The
O-rings are intact but the outer roller surface failed on a number of the
links, exposing the inner sleeve. The chain was cleaned and lubed every 500
miles per the owners manual. I ordered the chain online and don't have a
copy of the invoice. My previous D.I.D. chain lasted over 20,000 miles! Is
this eligible for a replacement even though I don't have the receipt?

Thank you for contacting D.I.D. Unfortunatley we need proof of purchase fo
file a warranty claim. If you have any further questions, please let me
know.

Thank you.

Have a nice day!

I can send you the chain, or just a section showing where the rollers are gone if that would be enough proof that I purchased it. I've used D.I.D. chains exclusively since I began riding over 10 years ago. This is the first one that has disappointed me, and will be the last one I ever buy if we can't work something out. I'm a moderator on a motorcycle forum, and opened a thread about this chain. I'll be updating it periodically.

You have a nice day too.
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