Webers are going to be getting close to fuel injection as you can get.
They are great carbs, a lot of tuning required to get it right.
Meaning, if you do not get carbs set up for your inline, best to have a friend that has different emulsion tubes, & assortment of jets to be able to get things going in the right direction.
Or talk with someone that know what emulsion tube s you need & jetting.

It's been so long I cannot remember what I had in mine, but I used 3 48 MM Webers which are too big for a 250 on the street.

Webers are cheap? How much is cheap? Typical price $375 & up

http://www.ebay.com/itm/3-Genuine-WEBER-...ea7&vxp=mtr

Here : http://www.ebay.com/itm/Genuine-WEBER-45...958&vxp=mtr

These are nice, but a bit big http://www.ebay.com/itm/Weber-50mm-DCOE-...71d&vxp=mtr

Decent price? http://www.ebay.com/itm/JAGUAR-XKE-4-2-T...154&vxp=mtr

MBHD

12 port SDS EFI