Have an 80cc no name that I cant get over 15-20 mph. The needle is set on notch closet to point and idle screw is wide open. Im thinking maybe the float. Can someone tell how to set the float to get max power and speed? Thanks.
you don't say what kind of carb so I will assume you have an NT.
The idle screw will have no effect on your top speed or how your motor runs.
All the idle screw does is raise the slide by the rounded end engaging a ramp
which is the same as twisting the throttle.
Put the clip back in the middle or 1 up from the middle.
Why is the clip on the lowest notch?
This is richening a probably already too richly jetted carb which will make it slow.
Is the motor 4 stroking at wide open throttle?
Is the throttle cable opening the slide fully?
You give no info, like is it a new build or what led up to this low speed?
What altitude you are at, mods, gearing, etc.
Post a pic and do not mess with the float level.