Thread: Gear Chart

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    Gear Chart
    #1
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    Gene

    So as not to hijack a thread again, I thought I would start a new one.

    I stuck your numbers from the one picture you posted into the chart I have and stuck in what mastrfabr says the primary for a busa is. * This is what I come up with. *

    I am not necessarily saying this one is right for sure, just that I come up with different numbers.

    Oh yeah, .... never have figured out why this thing shows ### when the numbers get over something like 105.
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    That is interesting
    #2
    Admin Gene's Avatar
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    Kent,
    According to your sheet my final drive selection of 6.94:1 is way too low. However, seat-of-the-pants in a Belmore car (and my sprocket rocket)says otherwise. Fortunately I can change it if needed.

    Fascinating discussion though whether to account for primary drive in final drive selction. Reading Yoshi's recent post it seemed that he was buzzing along somewhere between 65 and 80 MPH in fourth. Those results fall on either worksheet so his seat-of the-pants comments would add to the thread.

    On the # symbol there appears to be plenty of width to the cell but it may be that 105 is slightly wider than 101. Try widening the cell to carry the width.

    Nice work. This should get pinned with an Excel file for others to use.
    Gene
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    #3
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    I forget where I got this... might have been the Yahoo group?

    I think the primary absolutely has to be figured in to get the correct speeds etc. It is part of the gearing between the motor RPM and the Axle RPM.
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    #4
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    Ahh so that is all the the ### is. Seems like they could just cut off the number rather than doing that. Then I would have known to spread out the cells.
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    Re: Gear Chart
    #5
    Millenium Member plkracer's Avatar
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    Those are the same gear ratios as a 750 GSXR, but the rpm goes up to 13,700.
    Proud owner of a two seat pucker-mobile. Funco inspired mini buggy powered by a Busa. Giving out free rides to anyone brave enough.
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    Re: Gear Chart
    #6
    Member Risen's Avatar
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    that is a good chart for gearing for overall speed but a chart for showing
    gearing for torque would be more useful for torque and speed setup but i
    know weight will vary. Is there a cart on here for that to show a good base
    setup?
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    Re: That is interesting
    #7
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    Quote Originally Posted by Gene View Post
    Kent,
    ...........
    Nice work. This should get pinned with an Excel file for others to use.
    Gene
    Gene, and all, I have a nice gear chart in Excel. It is only 52KB including the formulas but when I try to download it says the max limit for .xls is 3KB. I cannot compress to that tiny file size.

    Rather than make a JPG, I wanted to post the file so others could use it and change the formulas if necessary for their particular buggy setup. Let me know if there is another way to post the spreadsheet.

    Harvey
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    Re: Gear Chart
    #8
    Admin Gene's Avatar
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    I will PM you with my email address. Maybe I can get it posted and we will look into the file size restriction. No MS file is 3k - that's ridiculous Bob!
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    Re: Gear Chart
    #9
    Millenium Member jersdunz's Avatar
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    I came across this cool little online calculator..

    Gearing Commander: Motorcycle Speed, RPM, Chain & Sprockets Calculator
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    Re: Gear Chart
    #10
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    Thank you for posting that link, very very helpful.

    I don't know that much about ATVs or Motorcycles. Do any of you know which models have the smaller engines like around 50cc? I'm researching transmissions for my SAE Baja senior project and what to find a good transmission to use on our 10 hp engine. Our goal is a 350 buggy with 40 mph max.

    Also, any recommendations of good websites to buy engines? Thank you for your input.
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