Kiwi_Roy Posted May 7, 2014 Report Share Posted May 7, 2014 The Speedhut gauges are a good replacement for the troublesome Veglias, about $300 for a pair A word of caution, they make many different types, you need 3-3/8" and be sure to let them know it's for a bike and they will add silicone to the glass. The reset button is normally through the glass but they have an option of adding a jack at the rear as you can see below. This jack is used to configure the tach for no of cylinders, calibrate the speedo and trip reset. Avoid Canbus type, that's a communication bus for modern autos. They also make GPS speedos but I prefer the old school pulse input I wanted a look somewhat similar to the OEM Veglia. There was no room for the large nut that normally holds the gauge, in fact it's a tight fit in the back cover so I attached a central bolt that will also serve to keep the back secured. The anodized extrusion was laying around otherwise a short length of flat bar threaded to take a stud would do equally well. JB Weld is your friend. The Speedhuts are only 1' deep so I sliced 3/4" out of the rear cover using a strip of masking tape as a guide. At the same time shaving off all the bumps and blocking off all the spare holes with bondo. I had to reduce the depth of the lamp fitting in the process. This worked out well as I wanted to upgrade to LED lamps anyway. The lamps are simply glued into the fitting with the wires soldered directly to the contacts, I expect the LEDs to outlast me. Note the original incandescent soldered in parallel with the low fuel light, this gives the fuel level sensor the current it needs to warm up when uncovered. Forceps are worth their weight in gold when soldering the wires. I like to use the 194 miniature wedge base lamps from www.superbrightleds.com They work on AC so polarity is not an issue. A quick test. I know, I should have had them add the Guzzi logo. I love the way the Speedhut numbers glow in the dark. You have a choice of 5 glow colours. The speedo operates on any sort of a pulse, I quote "The Speedometer is designed to work with any wave/pulse form from 1 volt - 100 volts. Pulses per mile from 500 - 250,000" I made a simple sensor from a magnet and a reed switch, the case is made from aluminum sheet glued to the nut off an old cable. The switch is fastened to the outside sensing the field through the aluminum. There are no wearing parts to worry about because the rotating magnet is supported by the gearbox shaft. To calibrate press Start, drive two miles (4 km) then press End, Speedhut takes care of the rest. A runners GPS is perfect for measuring the distance. 3 Link to comment Share on other sites More sharing options...
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