coyote killer
07-11-2004, 01:59 PM
I posted this in another thread and I thought everyone could benefit from this.....
to calculate your gear ratio divide the rear spocket size by the front sprocket size....for example,,,,a 44 tooth rear with a 13 front is a 3.385 to 1 ratio.....You can use this to calculate gear changes....
Also,,,,to calculate how many teeth to change after your tire swap use this program.....
http://www.virtualengine2000.com/Vi...culatorTour.htm .....
remember that there are two reduction ratios to consider on a 3 wheeler....the internal and the external(sprockets).....plus the gear ratios also have to be added....
for example,,,,a 84 250R has a primary reduction ratio of 3.25 and a secondary reduction(sprockets) ratio of 3.231 ....the top gear ratio is .839....so multiply all of these together and you get an overall ratio of 8.81.....enter this # in the mph calculator and you can figure what sprocket sizes you need for your new tires...
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to calculate your gear ratio divide the rear spocket size by the front sprocket size....for example,,,,a 44 tooth rear with a 13 front is a 3.385 to 1 ratio.....You can use this to calculate gear changes....
Also,,,,to calculate how many teeth to change after your tire swap use this program.....
http://www.virtualengine2000.com/Vi...culatorTour.htm .....
remember that there are two reduction ratios to consider on a 3 wheeler....the internal and the external(sprockets).....plus the gear ratios also have to be added....
for example,,,,a 84 250R has a primary reduction ratio of 3.25 and a secondary reduction(sprockets) ratio of 3.231 ....the top gear ratio is .839....so multiply all of these together and you get an overall ratio of 8.81.....enter this # in the mph calculator and you can figure what sprocket sizes you need for your new tires...
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