I've always had a bit of soft spot for FXR's the I bought new in 1987 I still have!!! I stripped it down start of last year and sold off the big engine , modified g/box & bodywork. I was gunna just build it up again as long term project but after looking around and doing a little bit of research I think Im gunna do a twin cam FXR. 

Does anyone know where i can get an enclosed FXR primary to go between a S&S T111 engine & baker DD6 ??

Sounds like a top build with a S&S 111 and DD6 box. What's wrong with a TC primary ? To long. I'm keen to watch the build as you will have the best handeling frame HD made with a S&S power plant.
Cheers

Slight change to the whole process now I cant get a FXR or FL primary to go between a twin cam to fxr tranny so im gunna have to stick with a evo engine in it. Im now going to use a S&S V111 engine but still use a Baker FXR gearbox.

Reddog wrote this on another forum.

The TC in a FXR is fairly simple. You must use a touring engine & trans set up and if you use the 01 and back it bolts right up to the oem FXR swing arm pivots. If you use the later set up with the lager pivot shaft you will have to ream out the trans mount to fit the larger pivot shaft. You will have to remove the crossmember on the frame that the side stand mounts to as it gets in the way. I used a side stand from a early FXE and it worked well. You will have to remove the rear crossover and lower it to clear the oil pan. I left enough of the original crossover on the frame so that I could drill holes in them to mount the lowered crossmember. To lower it I just used spacers and bolted a piece of steel plate up to the mounts. With the thicker steel it was stronger and since it was bolted up it made it easier to remove the oil pan in the future. You will also be removing the oem oil tank as you will not need it since you will be using the oil pan that comes with the TC set up. I welded up a plate to cover the void and it also worked out very well. If you are going to run mid controls you will want to weld up a mounting block on the right side and use dyna foot mounts as theres not a lot of room for the oem FXR right side foot peg mount. Forward controls are the easy way out however I prefer the mids. To wire it up you will need an engine control harness from say a 99 or 00 touring bike Carbed and match it up to the components needed by using the wiring diagram. There all color coded and simple to match up. Thats about it. I can tell you it's a very worth while project. Mine turned out to be exactly what I was shootin for. Handled great and rode smooth. I used an Underground performance build that produced 117 Tq and I think like 107 HP. the FXRS-SP looked stock (sleeper) and was a blast to ride.

There a few guys in the states running ohlins upside down forks and shocks with lightweight wheels on there hot 124 fxr's. Man wish I had money to build one.
Good luck with the build outlaw