Hi fellow Husaberg fans!, I am a bit of an expert with the Trailtech Vapour, having had them fitted to several types of bikes, they do have quirks and I will list them and the fixes.
1)The battery cover has to be nice and tight, if it is not you get corrosion and a sticky build up on the positive contact resulting in the unit resetting itself and the lights (backlights) turning on and off at random intervals. Fix by removing the battery cleaning the contacts and replacing battery. Use silicone neutral cure around the seal edge to stop this happening.
2)The temp guage does randomly stop working, simply push the reset button, (under the vapour with a straightened paperclip,- there is a hole supplied in the mounting housing if used), presto all good! incidentally these things turn to crap when you get to 131 Deg C, you need to press the reset and reset the time and any settings that have been wiped.
3) the units they say will work on any voltage and ac or dc any frequency, sorry but that is ********!, you can fit to motorcross bikes and hang it off the stator feed to the cdi but they do have a habit of resetting when you restart the bike. You are best to use a 1.2 Ah gell cell and make a diode tap off with a regulator with say a 500mA @ 13.8V DC charge feed to charge the battery and supply the Vapour, then all should be good.
4) You really need to fit to a bike with a battery
5) do not expect much from the tech guys at trailtech, hopeless is my most polite way of describing them.
6) KTM 300 / 380 EXC with the 110W 3 phase gen for some reason make these things do weird and wonderful things.
Summary, excellent units, but you must really fit to a bike with a battery, and you must seal the vapour at the battery cover.
Do that and all good.
(I have fitted to 07 DRZ400, 01 KTM380 EXC, KTM300 06, 08 KTM 300 EXC-e, Husaberg FE550 06, 06 RMZ450, and others, and have had 3 replaced under warranty in the last year until I sussed out the problems as above)
Just another note, if you leave then in direct sunlight in summer the entire face will show black starting with displaying all indicators in black first, cool down and reset with button and reload data)
The FE550 06 works on .5 pulses / rpm, tyre diameter 2205mm.
B/rgds
Neil.