Can someone help me adjust my settings on my carb OS 21 VZB V-spec. It stalls when I give it gas? I also want to re adjust the settings to were they need to be they have been played with. I want to make sure that I am not running to lean.

When accelerating from idle does it stumble, mess around and then quit? If so the idle is too rich.

If trying to accelerate and it just quits, the idle is too lean.

Thanks w8ye, when I give it gas it goes about 1 foot and then dies. Do you know how far out all the settings need to be?

Can you identify the low speed mixture setting needle?

is that the same as Mixture control valve?

On most carbs are the screws mostly out or are they in a lot?

Somewhere between 1 1/2 to 2 1/2 turns is normal for most carbs.

Download the manual here... http://www.osengines.com/manuals/21vzb-vspec-manual.pdf

The high speed needle is the one that sticks out at an angle.

The lowspeed needle is in the center of the throttle barrel on the same side of the carb as the high speed.