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Thread: 1982 GS750E 530 Chain Conversion

  1. #1
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    Default 1982 GS750E 530 Chain Conversion

    Planning to do the 530 chain conversion but would like a bit lower RPM at highway speeds (less buzzy). Thinking of going with 16T front sprocket (stock is 41R/15F). Suggestions (stick with stock or go up 1 or 2 teeth?) are welcomed.

    Looking at this kit, I can specify larger sprocket if desired:

    https://www.motosport.com/sunstar-53...ce=pdp&variant[SUT0001]=SUT0001-X001-Y219

  2. #2
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    Nessism is online now Forum LongTimer GSResource Superstar
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    When doing a 530 conversion you need to be mindful of the front sprocket diameter. A 15T front in 630 is roughly equal to an 18T in 530. If you have clearance you can try a 19T front, what will lower rpm's on the freeway a noticeable amount.

    41/15 = 2.73 ratio

    18 x 2.73 = 49T rear sprocket (for the stock ratio)

    You will also need a longer chain. 630 = 6/8 between links. 530 = 5/8. It's simple math to figure out chain length against the stock chain. Just be sure to round up to the nearest even number.

  3. #3
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    Thanks Nessism!

    I was curious, knowing that the 530 links are shorter I expected the sprockets to be smaller as well. It is interesting that the web site I linked above shows the new 530 sprockets (for 1982 GS750E) to be 41/15 with a 96 link chain, same numbers as the stock 630 setup.

  4. #4
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    Won't he need a spacer as well for the front sprocket?
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  5. #5
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    Quote Originally Posted by trevor View Post
    Won't he need a spacer as well for the front sprocket?
    I do not believe so on the GS750...

  6. #6
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    Quote Originally Posted by DucatiDave View Post
    I do not believe so on the GS750...
    It was almost ten years ago that I did my 80 gs750e but pretty sure it needed one....
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  7. #7
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    Hmmm, the plot thickens! I did use the Search function here and saw posts about the spacer being needed on 1000s and/or 1100s due to the fact that the OEM front sprocket was wider at the base (along the spindle) than the replacement sprockets. The width at the teeth is the same as the links are the same width. The spacer was needed because the nut that holds the sprocket on would not bottom out due to the reduced width at the shaft so the sprocket was "loose".

    Look forward to responses from others who have experience with the 750.

    BTW, I called Motosport and ended up ordering 16/42 to replace my 15/41. The chains all come in 120 link lengths so no issue there (calculations show I will need 116 links instead of the 96 from the 630 chain).

  8. #8
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    I always thought the 6mm spacer was required behind the front sprocket on all the 750/1000/1100 conversions.
    Check with Z1Enterprises, they used to offer a complete kit.
    https://www.z1enterprises.com/
    2@ \'78 GS1000

  9. #9
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    Just did mine recently and needed the spacer. IIRC, my research indicated that, of the 80's 16v 750s, the T and E need the spacer on the outside, the L did not (something of a different sprocket design of L). Z1 had the recommendation when I went on the site to order my sprockets.

    Here's the thread on my conversion w/ some good advice and links to what I bought, but I kept the standard ratio.
    Last edited by Rich82GS750TZ; 05-28-2021 at 02:10 PM.

  10. #10
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    Omg...I am just thrilled that I have been useful in a mechanical thread!
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