Welcome aboard. Does it drive in auto mode?
You need a good strong battery on these for them to work right. If you have a good battery on the machine, try initializing the system.
Machine in neutral
Hold up and down shift buttons in and turn key to on position
Hit up, down, up on the shift buttons, then open and close the throttle within 5 seconds.
That should re-initialize all the computer crap.
See if that changes anything.