The BS26 uses an air screw on the inlet side of the carburetor body. Turning it leans the idle mixture; turning it in richens it.
Use compressed air to blow out all internal circuits and dry the parts completely. 5. Critical Reassembly and Float Level Verification The Verified Float Height Measurement
The Mikuni BS26 carburetor consists of several key components, including: mikuni bs26 carburetor manual verified
The viton-tipped valve that stops fuel flow when the bowl is full.
14.0mm ± 1.0mm (Measured from the gasket surface without the gasket installed) 2. How the Mikuni BS26 Works The BS26 uses an air screw on the
The idle mixture screw calibrates fuel delivery at starting speeds and idle.
Before making modifications, baseline your carburetor using the verified factory specifications. While specific jetting varies slightly by vehicle manufacturer (such as Suzuki or Yamaha), standard baseline values provide a reliable starting point. Factory Specification / Measurement Main Jet (Stock) #110 to #132.5 (Application dependent) Pilot Jet (Stock) #15 to #22.5 Pilot Air Screw 1.5 to 2.25 turns out from lightly seated Float Height 17.1 mm ± 1.0 mm (Measured from gasket surface) Fuel Level 4.0 mm ± 0.5 mm below the bowl mating surface Idle Speed 1,300 – 1,500 RPM (Typical engine baseline) 2. Component Diagram and Anatomy How the Mikuni BS26 Works The idle mixture
Incorrect float height causes fuel overflow or lean starvation.
: The BS26 relies on a rubber diaphragm to lift the slide. Elias inspected it under a light, checking for the microscopic pinholes that often cause these carbs to fail.
Unlike manual slide carburetors (like the VM series) where the throttle cable directly lifts the slide, the BS26 utilizes a .