I'll make this first post quick just to show some of the inspiration and a little of the work already done. I have three of these cm 400's so I decided to turn one of them into a cafe.
The closest one is the one I am working on.

It won't be an extreme cafe build as I lend out my bikes to beginners often and I need them to be rideable in all weather so I won't be removing both fenders.
Here is my main inspiration EDIT Here are some other bikes I am stealing ideas from as well.
http://www.caferacer.net/forum/topic.asp?TOPIC_ID=8617


I love the look of cones and no airbox but I am not sold on the extra work yet...yet.
Here is what I have after two bike nights in the last week.
Shortened the front signals and then used the cut off posts to fill where the tach cable goes.
removed the grab bar and luggage rack
flipped the shift lever so that I will use the passenger pegs and then remove the main pegs

Flipped the fork ears to lower the head light and had to cut off some of the extra flanging on them so they would fit upside down.

Took the cut off from the front signal post and it fit almost perfectly where the tach cable was. Just welded the tube shut and bolted it in. Weird what fit.

You can see the lowered headlight in this shot as well as the flat bars. I am really tempted to put on clubmans but would love to see what it looks like first.

Cut down the front fender and used the cut off pieces to reshape the shorter fender. Will be cutting down the rear fender and removing the rear light assembly. I have a sweet old light from R&R salvage I rebuilt that will mount just behind the seat and the turn signals are being relplaced with smaller bullet style that go in the holes where the luggage rack was.

TO DO LIST IS
buy flat bars
clutch cable replace
new tail light
new rear signals
take off grab bar
take off luggage rack
shorten front signals
band back tank to fit
bar end mirrors
turn over headlight
cut down front fenders
small led dummy lights where?
lower speedo
lower ignition
lower choke
take of tach and plug hole
fix rear nut
take off exaust and H box
put on straight pipes
crash bar off
and the list goes on,.