Mikuni Bs26 Carburetor Manual Verified -

Start the engine and let it reach full operating temperature.

If you must turn the screw more than 3 turns out, the pilot jet is likely too small. If bottoming the screw doesn't kill the engine, the jet is too large. Mid-Range (Jet Needle)

If the engine bogs or hesitates during acceleration, adjust the jet needle. If the needle has adjustment notches, raise the E-clip to lower the needle (leaning the mixture) or lower the E-clip to raise the needle (richening the mixture). If the needle is fixed, use micro-washers under the clip base to richen the midrange. mikuni bs26 carburetor manual verified

To service the BS26 accurately, you must adhere to factory tolerances. Using the wrong torque or fuel levels will cause poor engine performance, hard starting, or fuel overflows. 26mm

| Part | Mikuni OEM number | |------|-------------------| | Pilot jet (#35, #38, #40) | N151.067 (series) | | Main jet (#97.5, #102, etc.) | N100.604 (large round) | | Float needle & seat | VM28/486 | | Float bowl gasket | BS26-001 (generic) | | Diaphragm (complete slide assembly) | 13229-45210 (Suzuki) / N224.213 | Start the engine and let it reach full operating temperature

| Component | Suzuki GSX250 | Kawasaki ZZR250 | Bajaj Pulsar 220 | |-----------|---------------|-----------------|------------------| | | #97.5 | #102 | #115 | | Pilot Jet | #35 | #38 | #40 | | Jet Needle | 5D28 (clip 3rd) | 5C30 (clip 2nd) | 6F24 (clip 3rd) | | Needle Jet | P-2 (O-2) | P-4 (O-4) | P-6 | | Pilot Screw (turns out) | 1.5 – 2.0 | 2.0 – 2.5 | 2.0 | | Float height (mm) | 13.0 ± 1 | 14.5 ± 1 | 12.8 ± 1 |

: measuring with bowl gasket compressed. Mid-Range (Jet Needle) If the engine bogs or

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.

Unlike manual slide carburetors (like the VM series) where the throttle cable directly lifts the slide, the BS26 utilizes a .