Topic: Question regarding the K8 carbs

[lrutt]

On most bikes I've worked on, when you adjust the low speed screw you start at about 1.5 turns out from stop. Turning it out more adds fuel and turning it in leans things out as you are actually adjusting fuel flow in the low speed circuit.

Although there are some carbs out there where you are adjusting the air flow, not fuel, so it's backwards. Turning it in richens the mixture and out leans it out.

How are the K8 carbs? I looked at my Clymer manual but it really gives no indication. I actually set them all to 2 turns out after I worked them over but it just doesn't seem right at idle. They are synch'd perfectly.

I'd like to have some basic idea before I go adjusting.

Thanks

[eurban]

A general ruel of thumb is that if the idle mix screw is on the air cleaner side of the carb body it controls air but if it is on the engine side of the carb it controls fuel.  In the case of the 77/78 carbs with the accel pump the screw is in the engine side and it controls the bleed of fuel.  Clockwise leans the mix while counterclockwise richens it.  The earlier carbs have air screws and clockwise richens while counter clockwise leans

[eldar]

Out is richer. in is leaner jsut to simplify it 

[lrutt]

that's what I thought, this is the most common but without a fuel flow diagram I couldn't be 100% sure.

[eldar]

It is common now but the 76 and earlier 750s had air screws. Out was leaner and in was richer on those.