What's up with my chain? - Tension varies as wheel turns - Kawasaki KLR 650 Forum
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post #1 of 26 Old 07-17-2013, 03:09 PM Thread Starter
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What's up with my chain? - Tension varies as wheel turns

I just upgraded to a 16t sprocket on my '08, and after letting it sit for a few days, took it out for a test ride last night. I heard a rhythmic rubbing noise coming from the chain that correlated with my speed.

Upon closer inspection (Pushing the bike along) it looks like my chain tension varies as the wheel turns. At times I've got about 2" slack, and other times there is no slack at all. Additionally, as it tightens up, I can see/hear a link 'click' on one or two of the rear sprocket teeth.

The real wheel looks to be in alignment, and the chain tensioner markers are equal on either side. Another note, does anyone know how many lbs. to torque the rear axle to, after I adjust it again?
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post #2 of 26 Old 07-17-2013, 03:18 PM
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69#'s on the axle nut torque.

Check your 16T sprocket install. Did you get it reversed?

My Kaw Barn - 2004 KLR, 2006 Concours (sold), 1997 Bayou 400.

"It's a friggen motorcycle, it's not supposed to be comfortable, quiet or safe. The wind noise is supposed to hurt your ears, the seat should be hard and riding it should make you shit your pants every now and then. "

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post #3 of 26 Old 07-17-2013, 03:21 PM
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Check this thread. You may glean some info from it.

http://www.klrforum.com/showthread.php?t=18682

My Kaw Barn - 2004 KLR, 2006 Concours (sold), 1997 Bayou 400.

"It's a friggen motorcycle, it's not supposed to be comfortable, quiet or safe. The wind noise is supposed to hurt your ears, the seat should be hard and riding it should make you shit your pants every now and then. "

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post #4 of 26 Old 07-17-2013, 03:25 PM Thread Starter
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I didn't have any instructions with the new sprocket -- how can I tell if it's reversed? Also, Do I need that rubber dampener behind the sprocket? Reading through a couple of threads, it seems like it might not be necessary.
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post #5 of 26 Old 07-17-2013, 03:32 PM
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Where did you get or who is the manufacturer of the sprocket? Some sprockets come with a spacer washer, some don't. The rubber bit only comes on the factory sprocket and is attached to it.


What is the condition of your chain??

My Kaw Barn - 2004 KLR, 2006 Concours (sold), 1997 Bayou 400.

"It's a friggen motorcycle, it's not supposed to be comfortable, quiet or safe. The wind noise is supposed to hurt your ears, the seat should be hard and riding it should make you shit your pants every now and then. "

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Last edited by klr4evr; 07-17-2013 at 03:37 PM.
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post #6 of 26 Old 07-17-2013, 03:36 PM Thread Starter
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The sprocket is a Sunstar 520, picked it up from Motorcycle superstore. I put the rubber dampener back on with this sprocket, could it be putting the sprocket out of alignment?
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post #7 of 26 Old 07-17-2013, 03:46 PM
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Don't trust the adjustment marks on the swingarm. Get a precise measurement from the centerline of the swingarm pivot bolt back to the axle. I check that on occasion but I usually just get down on my prayer bones, close one eye and look down the chain. You would be amazed how just the slightest deviation looks like a dogs leg.....
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post #8 of 26 Old 07-17-2013, 04:11 PM
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Quote:
Originally Posted by tommm View Post
The sprocket is a Sunstar 520, picked it up from Motorcycle superstore. I put the rubber dampener back on with this sprocket, could it be putting the sprocket out of alignment?
Ya best remove that. Just install the sprocket as it came. Does the Sunstar come with a washer? If I recall it has the shoulder machined on it and no washer.

My Kaw Barn - 2004 KLR, 2006 Concours (sold), 1997 Bayou 400.

"It's a friggen motorcycle, it's not supposed to be comfortable, quiet or safe. The wind noise is supposed to hurt your ears, the seat should be hard and riding it should make you shit your pants every now and then. "

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Last edited by klr4evr; 07-17-2013 at 04:14 PM.
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post #9 of 26 Old 07-17-2013, 04:20 PM Thread Starter
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Quote:
Originally Posted by klr4evr View Post
Ya best remove that. Just install the sprocket as it came. Does the Sunstar come with a washer? If I recall it has the shoulder machined on it and no washer.
Correct, no washer - I believe there is a shoulder machined on either side. I'll take out the rubber, realign the wheel and see what happens.
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post #10 of 26 Old 07-17-2013, 07:57 PM
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If your chain tension varies depending on where you check it, I would say your chain is pooched...
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