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Chain size for different gearing?

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  • Chain size for different gearing?

    I wanted to change my stock gearing and decided on 7/84. I looked up a chart to find the correct chain length and found the one linked below. It says for a gsr46 i need 108 (pins) so I divided by two resulting in a 54 link chain. I ordered the chain only to find out it's significantly too long.

    Is this chart just wrong or what am i missing here? I do have a different engine on there, but surely that won't matter since it bolts up to the clutch exactly the same.

    https://www.goped-scooter-tuning.de/...tml#supergsr46
    Last edited by dghdfgh; 11-05-2020, 08:54 PM.

  • #2
    It's hard to measure in exact links, buy some HD #25 chain from Amazon, 10 feet will run you around 15 buncha and get a chain breaker.
    85 Honda Xr200r
    85 suzuki lt250r quad racer.
    Pedless

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    • #3
      I would recommend chain direct from GoPed. I have found some eBay/Amazon #25 chain that does not work very well.

      Chain breaker is a must: https://www.billetboard.com/forum/sc...-section/7255-

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      • #4
        Why would you ever put an 84T on the back? That’s retarded. Also that gearing is terrible.

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        • #5
          I got a chain breaker and shortened it a bit, works fine now.

          No the gearing isn't retarded. It's for a honda gx35 engine. 7/84 (12:1) gearing goes about 22mph and can climb any hill well. I'm not looking for outright speed.

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          • #6
            Originally posted by dghdfgh View Post
            I got a chain breaker and shortened it a bit, works fine now.

            No the gearing isn't retarded. It's for a honda gx35 engine. 7/84 (12:1) gearing goes about 22mph and can climb any hill well. I'm not looking for outright speed.
            Because 7/84 is near identical to factory 46 gearing. Maybe 1.2mph change. Also why not just step rear sprocket size down and run 6/72, no need for longer chain or front sprocket.

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            • #7
              Firstly, I changed them because they were worn. The stock gearing was very close to what I wanted, so I just added slightly more top speed to not lose much torque. The reason to use a 7t instead is for longer life. Maybe next time I’ll use 8/98 for even longer life.

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