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I have a good idea as to what that grinding is.
It DOES have an LVC. When you accelerate, the batteries sag below it. However, since the batteries aren't actually dead, they pop back up above it as soon as the power is killed. Effectively, it's turning on and off a few dozen times per second. This used to happen with my controller when I was on only 48V and the batteries were near dead.
And, yah, I'll bet that motor got hot. Mine can get hot if I push it and I'm not even running half of that. Even a C'lyte would get warm at those kinds of power levels. Probably was a good idea you didn't ride for very long. :|
It DOES have an LVC. When you accelerate, the batteries sag below it. However, since the batteries aren't actually dead, they pop back up above it as soon as the power is killed. Effectively, it's turning on and off a few dozen times per second. This used to happen with my controller when I was on only 48V and the batteries were near dead.
And, yah, I'll bet that motor got hot. Mine can get hot if I push it and I'm not even running half of that. Even a C'lyte would get warm at those kinds of power levels. Probably was a good idea you didn't ride for very long. :|