Mikuni Bs26 Carburetor Manual Verified Updated

The information provided in this article is for general guidance only and should not be considered as a substitute for professional advice or repair manual instructions. Always consult the official Mikuni BS26 carburetor manual or a qualified mechanic for specific repair and maintenance procedures.

If the distance is not exactly 17.0mm, carefully bend the small metal tang on the float arm to adjust it. Bending toward the needle decreases float height (richening the circuit); bending away increases float height (leaning the circuit). 2. Tuning the Pilot Circuit (Idle to 25% Throttle)

Spray intake boot with carb cleaner to check for leaks; check cable routing. mikuni bs26 carburetor manual verified

Locate the fuel mixture screw on the side or bottom of the body. Gently turn it clockwise until it lightly seats, counting the exact number of half-turns. Write this number down. Back the screw completely out. Use a dental pick to retrieve the spring, small metal washer, and rubber O-ring hidden inside the passage. Cleaning and Inspection Protocol Do not submerge rubber parts in harsh solvents.

Set the screw exactly halfway between those two problem points. This yields the highest, smoothest idle speed. 3. Tuning the Needle and Main Jet (25% to 100% Throttle) The information provided in this article is for

Use specialized carburetor cleaner and compressed air to clear internal passageways. Ensure the tiny orifices in the pilot jet and the holes in the emulsion tube are completely clear.

While exact settings can vary by vehicle model (e.g., the Hyosung GV250 uses a "BDS26" variant), standard verified specs for the BS26 include: Standard Specification Idle RPM 1,400 ± 100 RPM (Typical) Float Height ~17mm (varies by application) Pilot Screw 1.5 to 2.0 turns out from seated 3. Maintenance & Cleaning Procedure Bending toward the needle decreases float height (richening

Gently turn the pilot screw clockwise until it lightly seats. Do not overtighten, or you will snap the fine tip off inside the carburetor body.

Use high-quality carburetor cleaner. Focus on the tiny pilot jet and the emulsion tube (needle jet). Use compressed air to blow out all passages.