There's a two-year-old thread addressing a K100 low seat install, an identical job but it had a few holes such as no specifics about the L Jetronic box holder the actuator rod (mine appears too short??) and the lack of expertise with placing the tank surround. So with that, I'll detail my install and recreate some of what I did tonight with pics tomorrow.
Kudos to my friend Eville Rich who sold me these cherry parts earlier this year. Seated posture is more upright, less of a reach to the bars...eerily cruiser- like posture. I like!
Good news is: with my Wilbur shock backed off completely on spring preload and low sport seat installed- I now sit 99% flat-footed in my Crocs ( shop safety shoe). My recollection is that this kit lowers the seat 1.5 inches to 29.5 inches. My jeans inseam is 28". I stand 5 foot 6.5"
Placing the tank surround doesn't require templates, only tough double-sided tape, preferably 3M and some patience.
First I installed the surround and seat dry to check fit and oogle a bit. Then I centered the surround and traced the perimeter with removable painters masking tape. This really pays when placing the side anchors. With the tape as reference points, there's no guessing when the backing comes off the tape.
Install the aft anchor installed in the surround. With the bolt installed and positioned I anchored the aft mount first without the side anchors installed and noting that the sides fell exactly on the reference tape. Press firmly then remove the bolt and the surround so the aft anchor can be pressed flat.
BTW I lightly buffed the mount points on the tank with a clean rag with a splash of Laquer Thinner. A tiny amount flashes without attacking the clear and this is the best degreaser for the double-sided tape..
With the surround removed I fit the side anchors in their respective slots on the surround... Slide the rear mount into alignment, install the bolt. Now remove the paper backing from the double sided tape, holding it away from the tank one in each hand. Take your time, maybe get a helper here.. Position with the masking tape perimeter mask as reference. Press the side anchors home. Now carefully remove the surround one last time and press the side anchors solidly in place without the surround attached. The bond definitely improves by removing the rubber surround, corners etc.. The surround should now align in position and install perfectly.
The L Jetronic box conversion and lock swap took a solid two hours working casually.
I'll add more details here later. Time to rest up for an early am test ride. Cheers.