Sensitive throttle on Caltrain Bilevel cabcar.

The throttle n the Caltrain BBL Cabcar is really sensitive, (i.e, one tap of the A/D key sends it into full throttle or emergency brake). If possible how can I fix this?
https://railworksamerica.com/forum/
https://railworksamerica.com/forum/viewtopic.php?f=29&t=20190