I've actually had several conversations with Berkley at SuperQuads in the U.K. They actually build stock-looking R1 raptors for the highway, because its legal there. They use stock R1s with mild tunes though. I researched the hell out of this swap but I haven't actually had one of my own so grain of salt.
They use the stock raptor fuel pump with the 04-06 and 2007-2008 Yamaha R1 Motor. Not sure what motor you're using. I had one all set up to buy and swap into mine but I talked to an engine shop who wants to build me a raptor motor and happens to have an opening the week after all my parts would arrive so it seems like fate. FOR NOW.
If you want to fab the R1 tank on, then you can use the R1 tank+pump but it looks funny and it sits a little high. I was going to run the Walbro190 with an inline setup for the R1 with 10PSI. Draws less power than the 255 and there's one of the models with the right PSI