After reading a recent thread about LED headlights I ordered a 3800 Lumen module from Cyclops. Because of a long standing dissatisfaction with the headlight on the 1993 Strada, I decided to at least install it in that motor's 5 3/4 in headlight to see if it would make a difference. Although I have had the light out, and have removed the bulb in the past, I was surprised by two things:
The white nylon plug at the end of the headlight harness had a black segment, showing the Ground connector had been quite hot for awhile, and;
The headlight and bulb have only one thin index groove and ridge to orient the bulb in its housing.
The bulb is an H-4, and was made in China. Must be the European standard? I am ordering a replacement unit just because I don't want to have to look for a bulb with that (to me, at least) non-standard design.
I installed a new headlight plug in case the heated connector has lost enough springiness to not be capable of being tightened now. I have seen that in the past, a female connector which has worked a little loose and gotten hot because of resulting high resistance had lost its tension and when I tried to tighten it a bit, it just crumbled.
It was a surprise that this was the ground connector. I had thought at first it would be the high beam, higher current flow connector but after awhile the gray matter pulled up the thought that if current is going into the high beam filament, it's sure enough coming back out through the ground wire!
While preparing motorcycles for the summer it might be a good idea to check all the push-on connectors for tightness. The headlight is noticeably brighter for that little bit of work.
I did install the LED unit in the EV, and was stunned how much brighter than the H-4 it is. Reading about it, even with pictures, does not carry the impact of turning the key and seeing things light up out in front!