MOTOR/GUIDE WIRE PROBLEMS
Heads-up, the motor wires are susceptible to breaking at the eyelet/ferrel. Thunderslot flattens normal size ferrels, then secures them against the pickup-braid with fat grub screws (2.5mm, 3mm?) much like BRM guides. **The flattening creates a sharp edge that cuts the sparse strands in the thin (1mm?) stock wire. Similar to a solder-break or lose eyelet the only symptoms are periodic power loss followed soon by complete lack of response to the controller.
SOLUTION-You must replace the wire (since they leave very little slack in the stock wires).
Using a large size ferrel (2 to 2.5mm) will work; and if used the grub screws are not needed and in fact cannot screw in deep enough to stay in the guide.
But if you again use normal/small ferrels, they require flattening so that the grubs can grab enough ‘meat’ in the threads to hold the braid and ferrel in the guide. Obviously this continues the risk of the wires being cut by the ferrel.
"... get on your bad motor scooter and ride!"
Sammy with Montrose