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Replacing rear sproket

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    #1

    Replacing rear sproket

    If I counted right my rear sprocket has 50 or 52 teeth (GS550E) and it seems to be wound pretty tight at 70 mph in 6th gear. I would like to replace it with a smaller rear sprocket to get a little bit more top cruising speed and let the engine run a little bit easier so do any of you have a suggestion on the size of sprocket? Also what size is the chain supposed to be?

    Steve E.............
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    #2
    You didn't count right, if you did, it would be either 50 or 52 teeth, not both. 1st suggestion would be a repair manual. It will tell you a lot about your bike. I think it's a 520 chain, and stock gearing is about as good as it gets, except for drag racing, etc.
    1983 GS1100E, 1983 CB1100F, 1991 GSX1100G, 1996 Kaw. ZL600 Eliminator, 1999 Bandit 1200S, 2005 Bandit 1200S, 2000 Kaw. ZRX 1100

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      #3
      Originally posted by se3388 View Post
      If I counted right my rear sprocket has 50 or 52 teeth (GS550E) and it seems to be wound pretty tight at 70 mph in 6th gear. I would like to replace it with a smaller rear sprocket to get a little bit more top cruising speed and let the engine run a little bit easier so do any of you have a suggestion on the size of sprocket? Also what size is the chain supposed to be?

      Steve E.............
      Chain is either 630 or 530, I would suspect 530. You can get an alluminum Vortex in a 530 in almost any size you prefer. The only down side is alluminum wont last as long. A nice option beyond the stock look is a Supersprox it has steel teeth and an alluminum carrier. If you decide to go with either the standard GS hub is the same bolt pattern as a 98 Bandit.

      Vortex on a GS hub



      Supersprox on the same GS hub (powder coated)



      Last edited by Guest; 06-07-2009, 12:18 AM.

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        #4
        Dang Joe! Nice stuff.
        1983 GS 1100E w/ 1230 kit, .340 lift Web Cams, Ape heavy duty valve springs, 83 1100 head with 1.5mm oversized SS intake valves, 1150 crank, Vance and Hines 1150 SuperHub, Star Racing high volume oil pump gears, 36mm carebs Dynojet stage 3 jet kit, Posplayr's SSPB, Progressive rear shocks and fork springs, Dyna 2000, Dynatek green coils and Vance & Hines 4-1 exhaust.
        1985 GS1150ES stock with 85 Red E bodywork.

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          #5
          550 engines need to spin, if you lug it around like a Harely it will die.
          http://img.photobucket.com/albums/v5...tatesMap-1.jpg

          Life is too short to ride an L.

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            #6
            rphillips

            It does say 50 or 52 teeth.

            jwhelan65

            Now that is some nice looking sprockets, almost a shame to get those oily.

            tkent02

            Guess I'll just leave it like it is. On another note, it seems strange to see just 85 mph top end on a speedometer. Thanks for the info guys.

            Steve E.........

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              #7
              Its a small ujm it needs to and is meant to turn fast. Dont worry about it. I think the revs sound cool on inline 4's. my opinion.

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