626 Concentric Carb Set Up

[Left Coast]

Hi All, thinking of putting a 626 Concentric on my 56 600 Twin. Any thoughts on initial settings for the new carb??

Thanks Lefty

[dave16mct]

Use the same settings as a 56 monobloc but use a main jet 20% smaller.
Dave

[Left Coast]

Hi Dave, is a T160 five ring needle OK? Needle jet cross drilled?
Lefty

[dave16mct]

No idea. I haven't got the needle lengths for concentrics, only monoblocs but I woud guess it's too long. On a 600 twin with a 376 monobloc the needle would be a C which is 95mm long.
Dave