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  1. #1
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    Default Probably a stupid chain question

    I've got a problem. Ish... My xs400 sprocket is a 530, but the rear sprocket on my wheel is a 428. Totally not compatible, correct? As in, I can't just use a 530 chain on that rear sprocket?

  2. #2

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    No, different pitch and width. You must change one sprocket to match the other and use a chain of the proper size to suit.

    Jim

  3. #3
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    Perfect, thanks! Answers my question. Now to find out what sprocket will fit on my rear wheel. Finding bolt pattern of sprockets are proving to be difficult. Might have to custom make a sprocket here.

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    I see Mike's has 530 rear sprockets, with a 4-bolt pattern for the XS400 - you didn't say what year, so maybe they got what ya need, or at least you can figure out what you need...XS360, RD400 have same bolt pattern. XS650 has a 6-bolt pattern; you never said what your bolt pattern of your rear sprocket is...
    https://www.mikesxs.net/mikes1-chain...sprockets.html

  5. #5
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    Unfortunately my rear wheel is not from an xs400. It's from a small company, and the sprocket has a bore of 58mm, and a bolt spacing of 64mm

  6. #6
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    Here is the XS400 rear sprocket; 74mm bore and 4 holes @ 110mm across:
    Click image for larger version. 

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    Just get a blank sprocket and get the holes machined to what you need:

    Blank Aluminum Rear Sprockets, 420,428,520,530, 630 chain sizes.
    Blank Aluminum Rear Sprockets, available in 420, 428, 520, 530 and 630 chain sizes.
    With 1.0in. center hole. No lightening holes or bolt holes.

    Note: If you need a center hole cut out, add center hole size below.

    You can add bolt holes if needed for additional cost.

    We will cut center hole at no extra charge, bolt holes are additional charge.

    Aluminum 7075-T651.:
    Made in USA:

    https://shop.pbisprockets.com/product.sc?productId=503

  7. #7
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    If you prefer steel for longevity you can match sprockets from any industrial supplier and have your local machine shop bore and drill them to spec (hand them your old sprocket as a pattern). Your local shop will have sprocket suppliers as that's a necessity for repair work and they're well used to fitting sprockets to all sorts of machinery.

    That will probably cost more than an aluminum sprocket so if it's just a bar bike ya may not want to bother. Use quality chain because as pins and bushings wear chain stretches and wears out sprockets faster. Begin with new or new condition sprockets and chain for longest life.

  8. #8
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    Thanks guys!
    TriNort; thanks for the website. I'm definitely going to use them.

    Farmall; Do I need steel for long distance? The maiden voyage will be a 2500km trip from BC to Born Free 12. Of course all the sprockets and chain will be new, because this is a custom build.

  9. #9
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    Default

    Click image for larger version. 

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  10. #10
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    Aluminum should be fine but the reason it's used is it's CHEAP because it's EASY TO MACHINE, besides being light for racing. (BTW the whole "billet' marketing shtick is likewise based on easy machining with low tool wear. ) A 400 won't tear it up.

    https://sprocketspecialists.com/custom-builds/ may do steel. Can't hurt to ask.

    Were it mine I'd run steel in the first place IF I was certain of my gearing. Pay once, cry once BUT you probably don't know what RATIO you'll prefer so running aluminum first could save money then you could figure out what you want after the road trip.

  11. #11
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    Ya, I would really prefer steel honestly. I'm studying ratios on the xs400, and I'm trying to really boil down to a final size. I know what I'm looking for in regards to acceleration vs top speed as well, so I can make a decision and go with it, just to get this build done.

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