Hey Appie,
Can you give us a bit more detail about exactly what is happening with the SP 10.5?
Some things that pop into my mind are:
1 - the A / B / C wires could be mixed up. (Although this gives you a shudder and rocky movement, not a high pitched whine as you describe)
2 - have you reset the ESC for your new motor (i.e. any timing / boost settings from before and its running the correct software?)
3 - not sure, but are you saying that your ESC doesnt have a sensor port for the lead to go into? If that is the case then there is your problem. It would appear that these motors can be run without a sensor, but its my opinion that I wouldnt want to. The motor is designed to run as sensored but its not getting any info from your ESC. This would most likely lead to weird things happening. :/
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