Dave, I too had the same issue on my 06 Classic. Don't have the gage but the light came on at approximately 52 miles. I thought possibly that if I installed the fuel gage it would be more accurate --- until I found out on this site that the gage and the light do use the same sending unit, therefore, the gage would have also been useless. I simply used the tripmeter as a reference. I "tolerated" this for almost a year and was about ready to disconnect the **** thing when I also heard that if disconnected, it screwed the computer up. Rather than risking this, I took it back to the dealer and demanded the sending unit be replaced which they did. Low fuel light now comes between 150 - 155 miles. There is an adjustment that can be made and I contemplated doing it myself but started thinking that if I paid that much for the bike, they should fix the problem. The dealer I bought mine from in Indianapolis, Ind (Indy Triumph) has been a real pleasure to deal with. I have absolutely no outstanding issues with their service department - very professional. Recently had the 10,000 mile check done and was very satisfied with the service. The bike has performed superbly since day one (other than the low fuel light problem). I think the reason some dealers don't want to fix this issue is that it does take time (probably more that Triumph allows). Only a thought.
