Help needed, just bought a 2001 xj900s, the bike is excellent but the fuel gauge wont work, have done the visual thing and yes there is juice in the tank any suggestions?

Hi this happened to my XJ 900 also, I found out that the float switch/sender in the tank had become worn on its spindle, this made the float contact point miss its pick up preventing the sender/switch from giving a reading.

I had to buy a new sender unit and this fixed the fault, the Yamaha shop told me that this was not an uncommon problem, You could prove that the sender has stopped working by making a connection between the feed wire and the return wire to the sender, if the rest of the system is working correctly then the gauge should read full,

hope this helps

Will give it a go and let you know the outcome.

Cheers