Do I need a fuel pump ?

Thanks Kawboy ! I got the book and read it, good information. Since then I've purchased a couple of pumps that weren't adequate. Currently I've fitted the Walbro 393. The first try was a failure. The pump came up to pressure but no fuel was being delivered. I pulled the injectors and cycled them as described in the service manual. I finally got everything together yesterday and once the air was purged the bike started and ran despite the pressure regulator, which had previously been regulating in the mid 30s, now letting 85 pounds of pressure through.
Oh Well, It did start and run. I've still more to do.
Bill