Not sure of the bike guys on here, but we used a Bosch 044 as our main pump
in a 1000hp turbocharged V8. It's relatively cheap and readily available. We also
use a Walbro H.O. 255lph pump as a secondary pump. I also have a buddy who
works on a Lola LeMans car, they use four 90's era 4 cyl Ford Ranger pumps on
a Judd V10, because they work well, cost >$70 and you can buy them anywhere
auto parts are sold. Lots of different avenues towards the same destination.