I HAVE A 1983 G1 IT GOES GREAT ON FLAT GROUND BUT WHEN EVER YOU TRY TO GO UP A INCLINE IT ABOUT DIES, SLOWES RIGHT DOWN IS THIS NORMAL? THE BATTERIES TAKE A GOOD CHARGE!
The first thing to do is test the batteries. Hook a meter to the batteries one at a time and see how low the voltage drops when going up a hill. Just because they charge doesn't mean they're good.