Many shops use flat rate billing. There is a big book that says how long each job takes and thats what you pay whether it takes that long or not. Sometimes they win sometimes they lose but you always pay the same.
It took me 4 hours to do a thorough job of replacing the clutch on my VT1100T. I am a 25 year mechanic. Mind you I cleaned everything and inspected everything and was VERY thorough. At a shop you are looking at about 2-3 hours
1998 VT1100T A.C.E. Tourer