WOW - Just finished installing these bulbs.... what a train wreck of a job !! at least on the 15.
This is not for the people lacking the constitution and patience to mess around with frustrating stuff...
Basically it was a shit show - with lots of curse words and blue smoke...
I decided to tackle this job from the front of the bike....I couldn't even see the bulbs from the top by the handlebars.... removing the two bolts that hold the black plastic splash guard from the bottom behind the lights mounted to the forks... That gave me much more room - if you can call it that to get your wrists in there... Also - you can see what is going on through the headlight,
Remove power connector from old bulb, pull out rubber ring, remove old bulb - easiest part of the job, though still a pain in the ass with the tight quarters... right side (throttle side) of the bike was a bit tougher then the left
Using the right adapter of the 3 that come in the box, just compare to old bulb - insert that in the headlight fixture and lock it down with the wire locking arm.... MAKE SURE that you have it going in - in the right direction. Test on the LED bulb for orientation. Now here is where everything goes down hill and why you might want to work from the front...
As soon as you get the bulb lined up - Black bars on the LED portion at the 3 & 9 oclock direction (power wire up), you'll turn it a bit more to the 4 & 10 oclock spot - push bulb into adapter and then twist bulb to lock it back into the 9 & 3 oclock spot... Every Time I did that the fan portion of the body would connect with the wire locking arm and unlock it and you would have to start over... When you start - you can watch this happening as you are struggling to get it in and then watch as the wire arm slips out of the slot... F#%@...
I ended up jamming / screwing a short semi sharpened pencil into that spot so the wire arm couldn't come out. Still was a struggle.... I cut the rubber boot so it would fit snuggly around the fan body, you should do this ahead of install - once it was mostly on you need to push the rubber boot down along the fan body to open up the air ways... careful, this can also unlock the wire arm.... take your time - it took me 1.5 hours or so farting around with some flames coming out the top of my head.... LOL
Tested and look good - will have to see how they are at night....
It might be nice for future design of these bulb adapters that they twist and lock in place the opposite direction to avoid the problem with the locking wire arm IMO.