I've just installed H7 low beam and H3 Highbeam HID's on my 2002 K1200LT and thought I'd share the process I went through.
This is how I went about doing it and this information is only supplied as an interesting history reading of what I did and not what you should or must do.
My H7 LB (LB = Low Beam) was a simple plug and play
My H3 HB was a lot more involved and took about 2.5hrs
Tools I used were Dremel tool (to do the cutting), Pliers (to do some bending), Drill (to cut out holes) and screw drivers (assorted )
The H7 LB HID's were eBay items but plug & play to suit the LT
The H3 HB HID's were eBay items but NOT plug and play for the LT so some work to install
I removed the complete light assembly from the LT as part of my servicing (removed fuel tank to do air filter and fuel filter) and that required the removal of fairing and thus light housing was easier to remove during this process.
My H3 LB was done whilst the light housing was off the bike but it's simply a matter of un-clipping the halogen and replacing it with a HID then connecting the wiring.
My H7 HID was a lot more difficult, I could NEVER imagine doing my H7 without having removed the light housing.
First things first:
I removed the main access cover to get access to the wiring and globes.
Then I unpluged the halogen positive and removed the halogen carrier. The retaining spring/clip holds the carrier in place.
I removed the old halogen from its carrier.
My H3 HID fitted perfectly into the old H3 halogen locating notches/slots
Close up of the old H3 halogen showing the locating notches/slots that exactly suit the H3 HID
I had to bend one of the locating tabs on the metal carrier out of the way because it was too close to the HID's high tension wire (not my photo but adjusted)
I put a slice up side of plastic carrier to let HID cables through middle hole. The hole was too small to allow the HID plug ends through so easier to slip through the sliced side entry
I noticed the HID is a lot taller than the halogen so a hole needs to be cut in the middle of the plastic globe carrier to allow the HID to fit. CAUTION as I noticed that the HID orientation needs to be exactly the same as the halogen so I did lots of cross checking and cross checking to make sure the orientation was EXACT.
On my test fitting I noticed the high tension wire on the HID was close to the chrome plastic inside the light housing so I trimmed the chrome plastic to allow more space between it and the HID high tension wire.
When I had finished this I put the metal and plastic carriers back together and slid it back into the the main light housing.
I reconnected the H3 positive to the old halogen Positive and ganged the H3 and H7 negatives together in the old H7 low beam halogen negative connector. It's a tight fit but I found that both the H3 and H7 negatives will fit the old halogen negative connector.
I also used the old halogen metal/spring tab to hold the completed H3 HID carrier in place. It took some bending but the old metal spring tab securely holds the H3 HID securely in its original place.
I cut some holes in the light housing cover to allow the HID wiring looms to exit. The HID wiring looms exiting the cover do NOT connect to power but to the ballast and back to the HID.
My completed H3 HID High beam installation finished off by sealing the cover holes with the supplied grommets. I was lucky as my HID's came with grommets and they are highly recommended to keep everything waterproof.
The HID ballast were tucked under and zip tied to the cross members as both ballast were waterproof and shook proof. .
All up, this job took me 2.5hrs and the end result is amazing. The H7 low beam HID installation I felt was better than the stock halogen highbeam but with the added power of the H3 high beam highway riding will be more comfortable.
By using the original halogen positives the high and low beam switch works each light perfectly.
I installed 'fast bright' H3 HID's because when I flick from low to high beam there is NO lag in time between the low/high beam although, this is not really an issue on my LT as the low beam stays on when high beam is on.