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Discussion Starter #1
2012 Vulcan under 5k miles I notice that once the gas gauge hits 1/2 a tank it tends to drop pretty quickly Is this a issue with this gauge and is it related to the general issues with the gas gauge accuracy ?
thanks
 

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Most motorcycle gas gauges seem to be logarithmic - 1st half goes down much slower than the last half. The gauges tend to be driven of a simple float in the tank so the 1st half of the tank (from full) has much more volume as the frame member is more at the bottom of the tank.
 

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Discussion Starter #3
Most motorcycle gas gauges seem to be logarithmic - 1st half goes down much slower than the last half. The gauges tend to be driven of a simple float in the tank so the 1st half of the tank (from full) has much more volume as the frame member is more at the bottom of the tank.
you sir are one smart gas jockey
thank you
 

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The gas gauge is very inaccurate right from the factory.It can be helped buy adding a resistor to the wiring harness as described in the sticky(gas gauge fix) at the top of the page.With the resistor mod my gauge reads 1/8 of a tank at about 170 miles on the odometer which is about the same time the low fuel light comes on.
 
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