You can coast if you want just by chopping the throttle, but if you want engine brake you have to pull the left lever.
You can hear it working in the first video on lap 1 going into T3 the motor goes quiet as it rear gets light then spins back up.
Its like the GP bikes, they actually ride the clutch lever going into a turn to get a bit more slip or reduce engine brake.
Theres some onbike vids you can see their fingers pull the clutch lever a few mill.
I don't like to have anything that's supposed to be variable locked into a preset value.
Voltron cost $45k, Motor & Controller were $20k.
I may have spent $35k over the last 5 years.
Next bike, I want to start with an RSV4 rolling chassis. Probly cost $30k but that would make the fastest electric race bike.
A German RC motor company is about to release a 400v motor controller combo that weighs 15kg and is good for 175hp.