Made the steering angle better, the bus is faster now, and you can now back steer!
BUS 5500.0 33187.9 2.0 0.0 0.5 0.0 90 0.75 0.85 0.40 5 250.0 19.0 70.0 4 D 7.17 0.40 0 42.5 1.2 0.07 0.0 0.45 -0.25 0.45 0.0 0.2 0.75 15000 4002 1100040 1 1 16
Replace that line in your handling.cfg file
C:\Program Files (x86)\Rockstar Games\GTA San Andreas\data\handling.cfg