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gearing Questions

Discussion in 'Technical and Troubleshooting Torque' at netrider.net.au started by Glennb, Nov 26, 2005.

  1. Im looking at putting a larger tyre on My bike was wondering how much this is going to effect my final tire/gear ratio.
    stock is 15/45=.31111 fg ratio on a 130/80 tire(not sure if tire makes a differance)
    Question is what will my final gear ratio be with a 130/90 on the bike.
    OR
    Is there a formular that I can work with so I can work out how much I have to gear down to get the tire/gear ratio back to stock specs.

    Also a general Question on gearing : does more teeth on the back sprocket and/or lesser teeth on the front sprocket increase your 0-100 and 1/4 mile times. But you loose top end speed. Is that right??
    Cheers
    Glenn


     
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  2. more on the back does the same as less on the front .... faster acceleration ... less top speed .... its ROUGHLY 4-1 ratio .. that is 4 teeth on the rear = one les on the front .... iam sure theres an exact formula but i dont know it .... as for aspect ratios of tyres .. i doubt you would notice the difference ... remembering theres about 5 mm of tread depth between a new tyre and a worn tyre and you dont notice that ...... hope that was of some help
     
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  3. When I changed my 250 to a 350 I changed the gearing from 15/40 to 16/36, if that helps. I had to do that because it had vicious acceleration but was revving like crazy in top at highway speeds.....
     
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