I'm having temp issues with my Tekin 1900Kv motor in my 8ight E 3.0. The drivetrain appears to spin freely, no binding and it's easy to spin. I went down a tooth on the pinion last weekend and temps went up. Went from a 16T to a 15T pinion. Temp outside was about the same both weekends. I'm running my current limiter at 40. The track is normally very loose because of dust. Any ideas?