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Old 01-28-2014, 06:18 PM   #20536
2bold2getold
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Does it have 520 sprockets on both ends or badly worn ? Looks like something is trying to pull the chain apart.
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Old 01-28-2014, 06:57 PM   #20537
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Originally Posted by 2bold2getold View Post
Does it have 520 sprockets on both ends or badly worn ? Looks like something is trying to pull the chain apart.
The sprockets and first chain were not that old. Maybe 1500 miles at the most on them. I've never seen a chain do this before.
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Old 01-28-2014, 07:42 PM   #20538
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Originally Posted by tntmo View Post
The sprockets and first chain were not that old. Maybe 1500 miles at the most on them. I've never seen a chain do this before.
If the chain line is right, and nothing is hitting the chain, it's got to have something wrong with the sprockets or chain. Not likely to get 2 chains crack the same way. You might switch out chains and sprockets with your bike, or pull them off and compare, just as a test.
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Old 01-28-2014, 07:52 PM   #20539
tntmo
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Quote:
Originally Posted by 2bold2getold View Post
If the chain line is right, and nothing is hitting the chain, it's got to have something wrong with the sprockets or chain. Not likely to get 2 chains crack the same way. You might switch out chains and sprockets with your bike, or pull them off and compare, just as a test.
I guess I should double check the swingarm install, too.

Front sprocket mounted correctly in your opinion? The shoulder on the sprocket is on the inside. Seems to me it should be on the outside, next to the clip?
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Old 01-28-2014, 07:55 PM   #20540
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Originally Posted by dryvr12 View Post
Hey guys. I recently purchased a peach of a dr250. Shes a 92 dr250 with 3950 miles on her! I thought I paid a fair price at $950, but upon reading some of the posts on here, I got one hell of a deal! This is my first bike and will hopefully serve as more economical transportation to and from school.
Congrats and good luck with your mods.
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Old 01-28-2014, 08:10 PM   #20541
2bold2getold
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Originally Posted by tntmo View Post
I guess I should double check the swingarm install, too.

Front sprocket mounted correctly in your opinion? The shoulder on the sprocket is on the inside. Seems to me it should be on the outside, next to the clip?
Mine has the "shoulder" on the outside.
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Old 01-29-2014, 04:25 AM   #20542
plugeye
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check rear wheel alignment too. i'd measure from swingarm pivot to axle, should be close to equal side to side
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Old 01-29-2014, 05:01 AM   #20543
Greg Bender
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Originally Posted by tntmo View Post
My neighbor's DR350 had some cracked links on the chain two weeks ago after some desert riding. We figured it was just due to age or perhaps a faulty chain. He picked up a new chain, RK non O-ring and installed it and we figured all was well. Less than 200 miles, it's cracking again.

All cracks are on the inside of the link, same as the last chain. He recently had the rear swingarm off to clean and lube it all up, and he had the sprocket off also. Is the front sprocket installed correctly?

I think the collar on the sprocket should be facing outward instead of inward like he has it. Perhaps this is causing the chain to hit the case saver and cracking the links?
I agree, it makes sense that the shoulder should be on the outside. But, to the best of my knowledge, that is not correct. Instead, the shoulder should be on the inside.

I am not sure what would be causing that pattern of failure. The rubber swing arm protector looks worn, but I can't see that it would cause this.

Regards,

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Old 01-29-2014, 05:11 AM   #20544
toates89
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Too tight chain? Its supposed to have 1.5" of play(off the top of my head)
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Old 01-29-2014, 06:36 AM   #20545
thump!
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Quote:
Originally Posted by Greg Bender View Post
I agree, it makes sense that the shoulder should be on the outside. But, to the best of my knowledge, that is not correct. Instead, the shoulder should be on the inside.

I am not sure what would be causing that pattern of failure. The rubber swing arm protector looks worn, but I can't see that it would cause this.

Regards,

Gregory Bender
The parts fiche shows the shoulder to the outside.
http://www.mrcycles.com/oemparts/a/s...f/transmission
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Old 01-29-2014, 06:43 AM   #20546
Greg Bender
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Originally Posted by thump! View Post
The parts fiche shows the shoulder to the outside.
http://www.mrcycles.com/oemparts/a/s...f/transmission
I know it does, and so does the workshop manual. I have never seen an original Suzuki countersprocket, but I suspect they had collars on both sides. I know all of the aftermarket ones I purchase today do not. I do know that when I mounted the collar to the outside, that I got a lot of side wear on the teeth. Now that I mount the collar to the inside, I do not. For whatever that is worth...

It needs to be mounted so that it will not rub on the case saver AND be aligned as possible with the rear sprocket. Pragmatism rules! :>

Also, I recall reading somewhere that the collar goes to the inside, but I can't find that reference. Sorry.

Regards,

Gregory Bender
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Old 01-29-2014, 06:52 AM   #20547
jackanory
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Quote:
Originally Posted by tntmo View Post
My neighbor's DR350 had some cracked links on the chain two weeks ago after some desert riding. We figured it was just due to age or perhaps a faulty chain. He picked up a new chain, RK non O-ring and installed it and we figured all was well. Less than 200 miles, it's cracking again.
I would look for a rock jammed in the chainguide.
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Old 01-29-2014, 08:29 AM   #20548
tntmo
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The inside links look really close to the case saver. I think we're going to flip the front sprocket and double check everything.My DR has the sprocket with the shoulder inboard, has been that way for a long time with no issues.
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Old 01-29-2014, 10:36 AM   #20549
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I also have mine mounted to the inside. I don't think I put more logic into it than "more surface area for circlip". Never had any issues.
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Old 01-29-2014, 10:38 AM   #20550
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Also check to make sure both axle adjusters are keeping the wheel straight. You might be able to look down the length of the chain like a gun sight and see any misalignment.
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