which carb is this?

[TPR]

Hi all, im checking the floats on my 1979 and one float is approx 24 and the other is about 27mm. the right hand carb is leaking fuel from the bottom air intake from the airbox and that's the one which is set to the 24mm setting.
Points to that one being wrong but I have included some photo's as I would like to know for sure as to which carb I have and the correct setting please.

Also for the hell of it also included a picture of the bike which is nearly back on the road after 24 years laying in bits in a garage.

many thanks

 

[5twins]

I'm afraid I don't recognize those carbs, at least as a 650 set anyway. They may be from some other Yamaha model like the 400. 27mm may be the correct setting for the floats. I know it is the setting for the brass float equipped 650 BS34s. Best way to check for the correct fuel level is to use a clear tube connected to the drain on the bottom of the bowl. You want the fuel level to be about at the seam between the bowl and carb body .....

 

[Jan_P]

Think it is a Euro US Custom with the BS34's that ha the fuel feed to the outside of the carb

If it is that I don't have it on mine 1980 XS 650 US Custom fuel is fed center between the carbs.
T pipe
Pilot screw is also regular slotted

 

[gggGary]

Like skull sez, look like euro spec BS34's with the fuel lines on the outside.
Do a hot water dip test on the floats I am always leery of 40 year old brass floats and leaks.

 

[JJames]

Great to see one come together after all those years. Nice work. That looks like an old Suzuki tank?

 

[TPR]

Thanks for the replies.

Turns out they are set at 27mm- used the clear pipe way to check so thanks for the advice.