carbs bs38

Hope everyone is doing well. I need help, in more ways then one, lol. I am just finishing a total build on my XS2 and am having an issue I have never had in owning and working on these bikes since 71. Bike has all new ignition, dwell set to spec, timing on spec, advance on spec. Charging system...

Ive been trying to find a jet kit for my bar I carbs so i could try a bunch of different jets to get my bike running right. Its very rich at the moment and i dont want to pay 10 bucks for every single jet id like to test

Hey everyone! New to the forum, I just recently purchased a 1978 xs650 standard. With the bike i got an extra set of mikuni bs38 carbs, however they are the 70-75 year model. After doing some research i have found some minor differences, but not enough to distinguish one better than the other...