Stretched Chain? - Wrist Twisters
 
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post #1 of 17 Old 07-11-2007, 11:47 AM Thread Starter
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Stretched Chain?

My '04 919 is on it's second chain – about 15,000 miles on this RK 530XSO. When I adjust it and spin the wheel, I find tight spots and loose spots. I adjust it to correct tolerances when it is at it's most snug position. This means when the chain has rotated ¼ it's length, it is much looser. Another ¼ length and it's back to snug again. It happens to be snug when the master link is centered on either the counter sprocket or rear sprocket, and loose when it's centered between the sprockets – on either the top or bottom run. It seems to need adjustments more frequently as the chain ages. My sprockets (17T & original) seem fine.

I'm sure I haven't lubed it as often as I should (I use 90 wt gear oil), but I've never just run it dry for days. Mostly I just commute to work (120 miles per day). I don't ride on one wheel or flog it – pretty sedate riding style.

Any thoughts?

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post #2 of 17 Old 07-11-2007, 12:50 PM
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It sounds like your master link maybe siezed or tight so that it is not seating itself totally around the radius of the sprocket. are the sprockets in good shape?

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post #3 of 17 Old 07-11-2007, 12:56 PM
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One your sprocket looks like this you know you're ok... at that point the chain won't be constricted by anything.


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post #4 of 17 Old 07-11-2007, 12:58 PM
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Quote:
Originally Posted by ragdoll View Post
One your sprocket looks like this you know you're ok... at that point the chain won't be constricted by anything.

You don't have much luck with things made of metal do you.




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post #5 of 17 Old 07-11-2007, 01:05 PM
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Or with anything naturally or man made.

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'10 Unicycle

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post #6 of 17 Old 07-11-2007, 01:39 PM
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Quote:
Originally Posted by ragdoll View Post
One your sprocket looks like this you know you're ok... at that point the chain won't be constricted by anything.

How was the launch?Wiirrrrrrrrrrr+sparks

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post #7 of 17 Old 07-11-2007, 02:27 PM Thread Starter
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Alright ragdoll and dadogs, don't give up your day jobs! ...and now back to "my" problem! The sprockets are good, no noticeable wear. The masterlink is lubed, moves freely, and seats normally on both sprockets.

A few adjustments back, I noticed I had the adjuster out of alignment by a quarter notch. Even with the misalignment, when I spun the wheel the chain did not move laterally at all, and indexed perfectly on the sprockets.

Well, I've got another RK 530XSO on order so I guess I'll just start over.

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post #8 of 17 Old 07-11-2007, 02:36 PM
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Quote:
Originally Posted by support_six View Post
Alright ragdoll and dadogs, don't give up your day jobs! ...and now back to "my" problem! The sprockets are good, no noticeable wear. The masterlink is lubed, moves freely, and seats normally on both sprockets.

A few adjustments back, I noticed I had the adjuster out of alignment by a quarter notch. Even with the misalignment, when I spun the wheel the chain did not move laterally at all, and indexed perfectly on the sprockets.

Well, I've got another RK 530XSO on order so I guess I'll just start over.
15k on a chain is pretty good anyhow.

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post #9 of 17 Old 07-11-2007, 02:41 PM Thread Starter
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Quote:
Originally Posted by wisco919 View Post
15k on a chain is pretty good anyhow.
You're probably right. I doubt it's still under warranty! The new chain will probably fix the problem.

Regards,

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post #10 of 17 Old 07-11-2007, 03:23 PM
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Put new sprockets as well!

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post #11 of 17 Old 07-11-2007, 03:48 PM
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Quote:
Originally Posted by PHOBMAN View Post
Put new sprockets as well!
+1
Your sprockets might look fine to the naked eye, but the life of your new chain will be compromised if installed on used sprockets. Replace all together,
it's cheap insurance.

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post #12 of 17 Old 07-11-2007, 03:54 PM
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Is it still the original rear sprocket? I strongly recommend the chain and sprockets be replaced this time, and while I don't have a problem with 90w as a chain lube, it doesn't tend to stay where it's needed over the course of a 120 mile ride unless you lube it at the end of each leg of the commute. The easiest way to do this is a Loobman chain oiler -- just give it a squeeze at the beginning of the ride (they say every 50 miles: close enough) and you can ignore the chain. I am in a similar situation commute wise -- 52.6 miles to work, and my Scottoiler worries about the chain instead of me. Since I fit it 6000 miles ago, the chain has not needed an adjustment, and still has the same amount of free play on the center stand as it did after the first adjustment 2 days after installing the oiler.
Incidentally, a friend who works as a motorcycle courier (who surprisingly rides a chain drive bike) gets over 100,000 miles on a chain with a homemade version of a Scottoiler, and says every courier he has heard of on a chain drive bike uses some kind of oiler.
For about $50, how can you lose?

Rob

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post #13 of 17 Old 07-12-2007, 04:53 AM
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When I was drag racing one of my other bikes and I got it to hook up a couple of times nice it would bend the link pins on an o-ring chain. I had to move to a no o-ring chain to prevent it. It made the chain look like it had triangles in it. I would lube the chain on the maintenance stand with the motor running and in gear and I could hear the tight spots. Get a good chain they last longer and you'll have less horsepower lost in the drive system. Good luck.

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post #14 of 17 Old 07-12-2007, 06:34 AM
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Gear oil is for gears. Get some chain lube. 15k is a little premature to be shotski, but if you ride hard, that's the price for "doin' business".

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post #15 of 17 Old 07-12-2007, 06:41 AM
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I got 23,000 miles on my OEM ZX10R chain with proper maintenance. It never did have tight spots. It got to the point where the o-rings were shredding away. I've never done burn-outs on this bike. Point being regular maintenence is da-kind treatment. No substitute! And like Sniper said, go with chain lube. Plus!!!!!!! Kleen with Kerosene.




Oh, almost forgot......I also say change the sprockets right now.

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post #16 of 17 Old 07-12-2007, 06:44 AM
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I got a killer deal on a sprocket a few weeks back at www.indysportbikes.com . Hope that helps.

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post #17 of 17 Old 07-12-2007, 07:54 AM
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If you've got OEM sprockets and you change your chain at 15K miles, yeah sure it's suggested that you buy new sprockets, but if you don't how much faster will the chain honestly wear with the original (no signs of wear) sprockets?

My bet/hope is that it's VERY minimal.

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