Fuel guage oddity

[Alan Schlosser]

Here's a weird one. Brother picked up an 82 750T. Runs good. But the battery was dry when he got it. Put water in and it starts the bike. But, turn the key on and the fuel gauge reads to the left of empty. Run it up to 2000 rpm's and it reads. Run it up higher and it goes to left of empty again. He said he did clean the connectors from the sending unit to the harness. Any ideas? I thought maybe the battery was flaky and giving out weird voltages to the system. I suggested he start with a fresh battery, and who knows what the status of the original is.

 

[Alan Schlosser]

Go figure. New battery and the problem went away.

 

[posplayr]

that is why first thing in the stator pages says to test /check the battery.
Quick test is a first step unless you have a real battery tester.