I plugged in the scoot the other day to begin a typical charge, and heard a loud grinding noise from the front as the charge began. The noise was similar to what you would hear if someone were to grind gears when shifting in a standard shift car; very scary! The noise ran for five seconds then stopped, and I unplugged the bike. After much trepidation I plugged in again. This time there was no grinding, but I did hear a click, similar to that of a relay - not sure if this click has always been present or not. I repeated this test a couple of times with similar results.
I figured that the noise was likely fan-related - what other mechanical parts are in use during a charge? Afraid that I had lost a fan, I didn't want to proceed with a full charge. I charged for a few minutes at a time and monitored temperature, which seemed normal. I was not sure if only one or both battery fans (er, impellers :) ) were working, but the temperature held at a steady 28C, typical for my charges (August in Maryland), so I suspected that they were OK.
Since the noise came from the front of the bike, I pulled the headlight to see if anything was obviously wrong. I could see both charger fans spinning during charging. If a very slight pressure was applied to the front fairings, pushing them slightly towards each other, the fan noise would change and deepen in pitch, as if something was rubbing against the fan blades. I suspect that I may have a screw loose (ha), and that it got stuck in the charger fan blades. Is there a way to access these fans for closer inspection?
I have since completed a few charges and riding cycles, and the bike seems to charge and ride normally. However, I would like to remove and restore any pieces that may be loose in there.
Any other ideas or suggestions would certainly be appreciated.