Originally Posted by VENICE BOY
Yeah... I found that my bike runs best "LEAN" with the needle all the way down, (c-clip at the top)
I also "port matched" the intake manifold & exaust pipe to the cyinder ports for better flow.
Try a 36-T rear sprocket.
These carbs definitely give some room to fine tune your running.
I ran mine both lean for awhile, and I liked the way it ran smooth in the mid range. It just seemed to be a little too lean when under load or at 3/4 or higher throttle. I was worried I smoke something, so I went back to "a little too rich" which is where these engines were designed to be run.
If you do run lean, I would suggest a castor or castor blend oil fo' sho'.