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Discussion Starter #1
I replaced my stock 37 tooth rear sprocket with a 39 tooth. I asked a local shop to replace the chain to bring the wheelbase back to stock. After they mistakenly cut the new chain to the same length as the old one, they told me that they would order links for the new one.

Today I called to find out if the new links are in and was told that because of the way the master link works, they have to either add three links (making the wheelbase longer than stock) or none at all.

Is this true? If the chain were cut properly the first time, could it have been cut one or two links longer than stock to put my bike back at the stock wheelbase?

Thanks for any advice.
 

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Not to be snotty... but do you really think youll notice a difference? There not exactly going to have to extend your swingarm.... :) Ok... that sounded snotty. Yeah they could have cut it properly... make them get you a new chain and cut it how you want it this time.
 

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Of course I'll notice, not that I ride like Rossi or anything.
 

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Regardless of whether or not you might think I'd notice, can a chain be cut link by link? Or, for some reason, does it need to be cut every three links?
 

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This shop doesn't sound very bright. Firstly, they should eat the chain and set you up with a new one, since they screwed up. Don't feel bad for them. They can always hang on to that chain unti they can use it on something. But, failing that - if they have the piece they cut off the new chain, they could cut a piece 4,6, or 8 links long then shorten the chain they screwed up by two links less (or whatever the amount of the error was) and put the short piece in with two riveted master links to ge the right total number of links This ain't rocket science. I would find a new shop after making them get this right with you.
 

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I added two to the rear and raised the ride height as well, which brought the rear wheel forward almost to the limit. I realize the wheelbase is now shorter, but I can't tell the difference... even though I was worried about it.
 
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My bike came stock with a 15 tooth front, and a 39 tooth rear, and the stock chain was barely long enough for the propper amont of slack. Doesn't sound like there is much af a standard when it comes to "stock" wheelbase, now does it?
 

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If you change the sprocket to add two more teeth, your choices are to have the wheelbase be shorter by the distance of half a link or longer by the distance of half a link. You're not going to keep it the same unless you end up with a loose chain. Actually, if you could find a half link, one that is wide on one end and narrow on the other, you would be able to add two teeth and keep the exact same wheelbase.
 

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Link are always added in even multiples.. an inner and an outer... w/ a 520 chain and adding two teeth, the wheel base won't change significantly enough to notice... You can do the math, but why bother...
 
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