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Author Topic: Upper Chain Roller  (Read 569 times)

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Offline Taboo

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Upper Chain Roller
« on: June 06, 2012, 02:07:20 pm »
Hi All!

After reading that the upper chain roller should be removed on your bike, I decided to go look for mine. Lo and behold, it already sports a nice big hole in the frame!  :o

Should I do anything about it? Do I get someone to close it or do I just leave it?  ???
Getting dirty is only half the fun...
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Offline lecap

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Re: Upper Chain Roller
« Reply #1 on: June 07, 2012, 03:42:51 pm »
Ignore unless you service the swingarm pivot bearings.
If all the crap is out of the way you can weld a patch in there nicely.

And you should read more ;D
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Offline Firecoast

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Re: Upper Chain Roller
« Reply #2 on: June 07, 2012, 04:06:56 pm »
Why should it be removed? Surely it is there for a reason?
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Offline MildDog

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Re: Upper Chain Roller
« Reply #3 on: June 08, 2012, 02:09:15 pm »
Why should it be removed? Surely it is there for a reason?

It catches on the chain and then gets ripped out of the frame, leaves a nice R5-coin sized hole in the frame, as per Taboo's post.
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Offline lecap

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Re: Upper Chain Roller
« Reply #4 on: June 11, 2012, 11:29:31 am »
It's about as useful as your appendix. Just because it's there does not mean it serves a purpose.
But it causes pain if it breaks. Thus best removed preventively before it breaks.

Removing the upper chain roller on a DR650SE is a tad easier than removing your appendix.
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Offline Firecoast

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Re: Upper Chain Roller
« Reply #5 on: June 11, 2012, 11:41:47 am »
Cool, was just asking... even though I don't have a DR650...

Learn something new each day  :biggrin:
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Offline Ali

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Re: Upper Chain Roller
« Reply #6 on: June 13, 2012, 08:22:56 am »
Why do you only have to remove the top roller.
Can the bottom roller not do the same damage?
 

Offline lecap

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Re: Upper Chain Roller
« Reply #7 on: June 13, 2012, 09:56:45 am »
The chain hits the top roller violently when the suspension compresses and you close the tap at the same time (chain slack moves to the part over the swingarm).
The top roller is not needed at all. Plenty of space to the airbox after its removal and I never have seen signs of the chain touching the airbox.

The bottom roller is needed to prevent the chain from contacting the frame when the suspension tops out. It does not break leaving nasty holes in the frame.
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Offline Ali

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Re: Upper Chain Roller
« Reply #8 on: June 13, 2012, 10:26:58 am »
Thanks Lecap,

I removed the top roller on my DR last night, luckily no damage. 

Wanted to make sure about the bottom roller.
 

Offline spankme

Re: Upper Chain Roller
« Reply #9 on: June 13, 2012, 10:38:44 am »
I think its more because it seldom gets rotated during normal riding and the bearings seize up.
 

Offline Ali

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Re: Upper Chain Roller
« Reply #10 on: June 13, 2012, 10:46:41 am »
There is no bearings in the rollers, only a metal bush. The rollers on my bike turned easily but I decided to remove the top roller anyway. I think you will only damage the top roller if you top out the suspension like Lecap said.