RIM/Max IV sprockets and gear ratio

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Thread: RIM/Max IV sprockets and gear ratio

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  1. #1
    Join Date
    Oct 2014
    Location
    Holland, NY
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    14

    RIM/Max IV sprockets and gear ratio

    Has anyone experimented with changing gear ratio between transmission (15 tooth sprocket) and lower rear axle (34 tooth sprocket)? This gives a 2.26 :1 ratio. That was at the time when the machine was equipt with a 2 stroke engine. Now with a 4 stroke, i have torque but not much top speed. I am going to go with a 30 tooth sprocket on the rear drive axle to give me a 2.00 :1 ratio. Hopefully i have enough for tensioner adjustment, since that sprocket will be smaller. Ive also changed my secondary clutch to a smaller 9". Any thoughts on this?

  2. #2
    Join Date
    Feb 2013
    Location
    shenendoah valley,va.
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    2,645
    not sure what your saying ... but any sprockets changed on the wheel axles needs to be the same size on all three .or changing any on the trans or jackshaft have to be the same for both sides of the machine . otherwise you get chain windup or 3 wheels on one side turning faster than the other side . maybe you know this ...so good luck .let us know how it turns out . jboy va.

  3. #3
    Join Date
    May 2009
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    NJ 08533
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    5,052
    You will be fine but may have to loose a link or so. I put 28's in my racer for short tracks but we don't do them anymore so I have to go down more for the big tracks.


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  4. #4
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    Oct 2014
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    Holland, NY
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    Last edited by AllenCordier; 10-29-2023 at 10:10 AM. Reason: Trying to show diagram

  5. #5
    Join Date
    Oct 2014
    Location
    Holland, NY
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    In the diagram, these are the sprockets im referring to. Im only changing the main drive sprockets from the transmission which originally has 34 teeth to a 30 tooth sprocket. This will be done on both sides. All the rest of the sprockets will remain the same size so there wont be any binding. Jim, is this the sprocket you referred to changing to a 28 tooth for short track? Thanks for they replies.

  6. #6
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    Oct 2014
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  7. #7
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