Project D-$150

You are going to fight that VS carb with boost through this whole process. Even in a box with the spring flipped and the linkage modified, (and all the other modifications you have to do to make a carb work) you will still hang the secondaries open when you get off the throttle. I know some guys claim to have them working and in theory, in a box, they should work but the truth is it’s just not worth the hassle. And when you have to tune it (always) you have to completely disassemble the box (read; hassle). Save yourself the headache and find a used 650dp, do the hangar 18 mods and just blow through it. You’ll thank me later.