1130CC.COM / 1250CC.COM
14
V-Gauge Lite Manual V1.2
© 2008 Cliftech Design
5. User calibration
The V-Gauge Lite does not directly measure the speed and the amount of fuel used but uses the
values reported by the V-Rod’s computer control system (ECM). So, why may calibration be
needed? There are a number of variables that could affect the accuracy of the reported values
including gear ratio and tire size. There are provisions for calibrating the speed and the fuel
use as well as for compensating for different size secondary drive pulleys. For the gear position
indicator to work correctly, the number of teeth on the drive pulley must be entered. If the
Harley-Davidson computer download has not been done for a new drive pulley or if the stock
tire size has been changed, then a speed calibration must also be made. The user calibration
also allows the units to be switched between metric and English units.
Figure 20
– Map of the user calibration screens. User calibration is started by holding the upper button
while powering up the V-Gauge Lite.
Entering the user calibration mode and making adjustments
The user calibration can be a one time operation. The calibration factors are stored in non-
volatile memory and, once correct, should never need to be changed. The user calibration
mode is entered by holding the upper button while powering up the V-Gauge Lite. As shown in
the Figure 20 map, there are 4 calibration screens and a serial number screen. In each of the
calibration screens, the upper and lower buttons are used to adjust the values. Pressing both
buttons at the same time advances to the next screen. Take care to press the buttons
simultaneously to avoid accidentally making an unwanted change as you leave each screen.
Figure 21
– The serial number screen. Note: the current firmware is V1.2
