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1- Choose Your Bike: The gearing fields will automatically change for you |
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800 Drifter1500 Drifter |
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2- Enter RPM or speed into green cells. |
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3- View results in bold. |
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Note, there are additional changeable cells (bottom left) for those who measure speed in KPH and for those whose |
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speedometers are not correct. Vulcan digital speedometers are typically 10% fast from the factory. |
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Let Engine RPM = |
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Let Vehicle Speed = |
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Primary Reduction |
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(for motorcycles only; |
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Overall |
Vehicle Speed |
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% of max RPM |
Engine speed |
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use 1.0 for cars) |
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Reduction |
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(RPM) |
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Transmission |
1st |
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2nd |
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Gear |
3rd |
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4th |
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Ratios |
5th |
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6th |
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Final Drive Reduction |
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Tire Diameter (inches) |
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Circumference = |
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Engine Redline (RPM) |
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Speedometer Error |
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(+) If speedo reads fast and (-) if the speedo reads slow |
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Enter (0) to see actual vehicle speeds |
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Units (MPH or KPH) |
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