Comparability 81' carb on a 79' motor

[Carolinarooster]

Hola, amigos
So, sorry if this has been answered...
I have a 1979 XS400 with a bad carb
I have a clean, operational, 81 carb.
Can I just mount this on and ride out?

Thanks in advance.

 

[Wolfe_11B]

The 81 might be a bit different due to the environmental regs at the time. I think they run leaner and the carb is plugged so you can't mess with it. If you are going to swap, you should swap both

 

[xschris]

Only in pairs they can be swapped. The 77-79 carbs are designed different. The slides are smaller in diameter than the later ones. There are other changes also. Keep the years matched.

 

[Carolinarooster]

Thanks. I got around to cleaning it and noticed my air mix screws were broke off. shit. not sure how to get them out

 

[xschris]

Do a search of the forum there are different methods for removing them.

 

[Carolinarooster]

Thanks, I ended up pushing them through with a dental pick, and a needle. Took a little bit bit they popped out without any noticeable damage.
But, I then realized the mix screws were broke and the ones on my 81' card are not the same.
So, I just decided to counter sync the 81' and set the air mix screws at 3 turns out, installed it, and its started first try with a steady consistent idle! HYPED i need to hook the tachometer up and tune it down a bit, but i think until my new screws arrive ill run this.
thanks dudes