80A Hobbywing has a 4S limit - probably bound by the BEC.
1800KV is by no means a 6S motor. 1400 is a 6S motor. 1700 is a 5S motor. 2000 is a 4S motor. 2500 is a 3S motor.
If the ESC and motor aren't getting warm then it's in its sweet spot. When one component is hotter than another, or it's all running hot - that's when you need to worry.
Remember, it only uses buggy gearing in the diffs - hence the massive spur (like the original X1-CRT).
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