Hold the rubber slide diaphragm up to a bright light. If you see any light through the rubber, it must be replaced.
Start at 2.0 to 2.5 turns out from lightly seated. The Needle Clip mikuni bs26 carburetor manual verified
Typically 17mm to 18.5mm (measured from the gasket surface to the top of the float without compressing the spring). 3. Step-by-Step Cleaning & Inspection Hold the rubber slide diaphragm up to a bright light
Stuck float, dirty needle seat, or incorrect float height. The Needle Clip Typically 17mm to 18
Mikuni BS26 Carburetor: The Ultimate Maintenance & Tuning Manual
If you experience a "flat spot" during mid-range acceleration (1/4 to 3/4 throttle), you may need to adjust the jet needle.
This is often caused by an air leak. Spray starter fluid around the intake boot; if the RPMs jump, you have a leak. 6. Pro-Tip: The "Vacuum Test"