I have installed new handlebar switches (the installation was pretty straightforward) and found out that the old left one had a broken high beam flash button, and the old right one had a broken tip that was supposed to fix the handlebar switch in place on the handlebar.
I was quite surprised to find out that that tip was plastic rather than metal.

I also installed cheap plastic taobao hand guards on the scooter. Now it's much more comfortable to ride in the rain and in cold weather.