I've recently fitted one to my xrr. If you're after a roller pumper carb on the cheap, it's well worth looking at.
It's a bit of a tight squeeze and requires tilting towards the frame (without modify the tank). This does result in the corner of the float bowl being close to the exhaust. If you've an FMF power bomb pipe, you may find it won't fit. But otherwise fits with just a little attention to the throttle bracket.
I'm still working out the jetting, after some pointers from Bruce. 140 main, 25 pilot, and leanest pumper. I'm still using the standard needle and jet as I can't find the 9DJH1-01 listed. Perhaps you used the 9DJY01 from the TM40/HS40?