Thanks Pat for your message.
In fact, I had initialy a LSW-675 controller (sensorless). It does work but (throttle only) the motor cuts out if I push the throttle too quickly.
On a french forum, one made me buy a Kelly, but quite difficult to operate !Hot spark when connecting the battery, have to fix a by-pass with the resistance..
I bought recently a KU65, sensored or not, but I need new small connectors.
Two 3 wires with red and black are possibly for throttle, I didn't find the schema...
I forgot the speed sensor... might be a good advice, Pat.
So, I am a bit lost !!
I am going to buy these 3 pins connectors, and try again all combinations...
Thanks