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Old 09-13-2010, 09:03 AM   #1
TomballD
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Mechanical Conundrum - Shrinking Chain

I have replaced rear tires and tubes at least 10 times on my Honda 50 in the past 2 years and this has never happened, so please help me with some explanations as to what is going on. So I took my wheel in to have a new tube installed, and when I brought it home and put it back together, the chain that used to be stretched to the fartherst notch of extension would not fit. The chain when on the sprocket was so tight the wheel would not spin, and the tire (10x3.00) street tire was rubbing the swing arm. Now how is this possible if the chain was previoulsy so loose it was popping off the sprocket, and stretched to the maximum extension point? But now it seems to have magically shrank 2 inches? WTF? I checked to make sure that there is nothing between the chain, that all the spacers and adjustments, bearing are good, but to no avail. Its baffling, especially since I have done this 10 times, with no issue? Any ideas?
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Old 09-13-2010, 09:23 AM   #2
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are you positive that you got your wheel back, and not someone else's wheel with different gearing? Not too sure what else could be causing your issue other than a sprocket change.
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Old 09-13-2010, 09:52 AM   #3
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Has to be different sprockets.
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Old 09-13-2010, 10:00 AM   #4
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Yeah, i don't see how that's possible either. It's not like links just dissapeared out of your chain. Where was the tire rubbing on the swingarm? The middle of the inside?

Bring the bike out to MNM tonight! You know we can get it figured out there.
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Old 09-13-2010, 10:03 AM   #5
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Thats what I was thinking, but I am 90% sure that its the same wheel because of distiguishing marks on the wheel and the wear on the tire, but its worth a call to see if they had something similar in the shop, I'm pretty sure that Honda of Houston tags their work, but their is really no logical explanation as to what happened. And I discovered that using 2 masterlinks with a link inbetween them wasnt a good idea, guess for that to have a remote possibilty of working i should have split the chain with a master link at equal halfway points, but thats just a waste of time for a 20 dollar chain.
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Old 09-13-2010, 10:05 AM   #6
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yeah its rubbing on the center bar of the swingarm, I may just call Honda and see if they have a chain, but I would need one with more links then stock. The only other thing i can think is that the tire has way to much pressure, but theres no way, and that just doesnt make sense, or possibly i the swingarm up going off a big jump when the tire blew, but it all looks normal?
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Old 09-13-2010, 10:10 AM   #7
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count the teeth
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Old 09-13-2010, 10:19 AM   #8
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Will do
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Old 09-13-2010, 10:21 AM   #9
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I really don't think it's the tire pressure. My tire has about 3/4" ish clearance between the tire and swingarm after it's all tightened up. It's not like you messed with the chain while the tire was off for repair. It shouldn't be the chain. How did you get the chain on the sprocket with it being that tight?
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Old 09-13-2010, 10:22 AM   #10
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Its a pretty safe bet the chain didn't shrink. So the sprocket is the only reasonable explanation.
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Old 09-13-2010, 10:36 AM   #11
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yeah the only thing a chain does is stretch, that why I was scratchin my head for so long, because I swear that its my wheel, it just dosent make sense, I mean how many 50 wheels could they have with a zippy tire come through in one day? Someone is probably out there saying, " Hey why is this chain so LONG!" haha
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Old 09-13-2010, 10:43 AM   #12
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Bring it out to MNM tonight!
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Old 09-13-2010, 03:35 PM   #13
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only other thing beside different size sprockets would have to be different size tire contacting swing arm prematurely.
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