Mikuni Bs26 Carburetor Manual Verified

This frustrating "flat spot" has a few verified causes:

Unfortunately, Mikuni doesn't freely publish a dedicated BS26 manual online. Your most reliable sources are the for the specific bikes that used this carburetor. For the BS26, some of the best official documentation exists within:

Here are the key specifications of the Mikuni BS26 carburetor: mikuni bs26 carburetor manual verified

Remove float bowl, extract pilot jet, clear passage with solvent and compressed air. Dirty inlet valve seat or incorrect float height setting.

Issue 3: Hanging Idle (Engine Stays at High RPM After Letting Go of Throttle) This frustrating "flat spot" has a few verified

| | Circuit | Primary Components | How the Mixture Adjusts | | :--- | :--- | :--- | :--- | | Idle to 1/4 throttle | Pilot Circuit | Pilot Jet, Pilot Air Screw | Fuel screw: Turning out (counter-clockwise) = richer. Air screw: Turning out (counter-clockwise) = leaner. | | 1/4 to 3/4 throttle | Needle/Throttle Valve Circuit | Jet Needle, Needle Jet, Vacuum Piston | Lowering the clip (raising the needle) = richer. Raising the clip (lowering the needle) = leaner. | | 3/4 to Full throttle | Main Circuit | Main Jet, Main Air Jet | Larger main jet number = richer air-fuel mixture. Smaller number = leaner. |

Pull the slide assembly upward. Hold the rubber diaphragm up to a bright light. Look for pinholes, tears, or hardening. Replace if any light shines through. Dirty inlet valve seat or incorrect float height setting

Spray carburetor cleaner through every passage, jet, and emulsion tube hole.

The Mikuni BS26 carburetor is a vacuum-operated, slide-type carburetor designed to provide optimal performance and fuel efficiency. It features a 26mm throttle bore and is typically used on single-cylinder engines. The BS26 carburetor is known for its simplicity, ease of use, and adjustability.

“The BS26 main jet can be changed without removing the carburetor.”