Throttle response changed after increasing battery voltage

[Zambam]

Throttle profile battery @ 73.4 V
Moved scale on throttle for better view.
Added handle on grip for better control of throttle for the test.

 

[Zambam]

Deleted the video in post #44 (battery at 71.7V) by accident. Sorry about that.
I transcribed the readings from video above (battery at 73.4V). With higher battery voltage, throttle voltage at rest is a little higher at 0.80 V. Top speed increased by 3 KmH. Rain today- no test rides.

 

[larsb]

I'd try to single out the issue by removing all but the stuff needed for riding, like brake sensors, buttons and anything else that could cause controller errors. I've had intermittent issues like yours with a throttle wire that i strapped too short and hard to the frame, wire broke and shorted during riding after about a year, causing hickups similar to yours. I've also had similar issues caused by motor hall sensors that were starting to malfunction intermittently - so root cause could be many things.

 

[TommyCat]

 

[Zambam]

Got back from a 4 mile ride w. no throttle issues.

throttle V at rest 0.8 V

Battery after ride 73.08 V

 

[Zambam]

On the way back from a 6 mile ride, throttle acted up again. I was exiting a parking lot to the street, slowed down a bit then gave throttle when there's no response from the motor. As I was rolling down the street, I increased throttle to max, saw the DMM throttle voltage max out but no motor response. While holding the throttle at max, I worked both brake levers with no change, still no motor response. Rolled to a stop, worked the throttle up and down, throttle voltage was changing relative to throttle position, still no motor response. Finally backed throttle all the way to its stop, then forward and rode home.

This is not the OE throttle but behavior is the same. I want to put the OE throttle back (currently lashed to the moped rails where the 3 speed level switch is needed to run the moped).

TommyCat what do you think I should try next? Buy a new controller?