I am not sure what pump or engine you have on your sportster, but on my 2002 Sportster LE with the 951 removing the reverse bucket is easy peasy...
1) Remove the steering cable and bolt from the nozzle.
2) Remove the reverse bucket cable.
3) remove the 4 bolts that hold the steering nozzle and reverse bucket to the pump and remove nozzle and bucket.
4) remove the 4 bolts that hold the pump on to the transom. You may have a neoprene seal or RTV/Silicone sealant between the pump and transom wall so it make take a bit of pulling.
Its easiest (for me) to inspect the impeller and replace the pump oil with the pump on a work bench. Easier to pressure test as well.
Last year I replaced a broken reverse bucket, damage impeller (twice), and replaced my engine. I can now remove the pump, change a wear ring, and reinstall in less then 20 minutes.. 15 if im in a real hurry! .