L2R has you pointed in the right direction so I'm just going to throw in an Ole Fossil's Opinion. If you can swing the extra bucks invest in a pair of these babies. You will not be sorry. Light up the road like Broadway.
No problem Foss. you give a good point. I put HID on my sabre and it made a big difference.
BTW, these lights you linked are cheaper than oem. I was quoted $30 a piece. I needed one recently and wanted it same day. When I vomited upon hearing the price, the counter guy said, "hey I got some in the back, same bulb, no brand name for $10 each so I put in 2 because of the hassle to install. If I would have had time tho' install what Fossil linked above.
This is a timely thread; I took my '88 headlight apart yesterday,but, I couldn't post anything. Glad to see things are back to normal! Anyway, what I found was that the plunger that is used to adjust the headlight was "dry & sticky". So, tinkering is what I do best..I lubed it! It would hardly move before that, the spring couldn't overcome the resistance & the knob was "stiff" at best. It's all good now, I was going to say this yesterday..we all know how that went. So, just a FYI.
BTW, I didn't know this & maybe others don't either...this adjustment is different on the 1500's and the 1200's.
The 15's have a "tab" that the plunger butts up against, this is what moves when you turn the knob..the 12's are connected directly to the headlight; There is a "tiny" gear on the headlight end of the adjuster cable..it's a slip fit & can fall off AND did in my case... only to disappear into the bowels of the fairing..that lil sucker was hell to find! Just a heads-up in case anyone does this.