| Component | Specification | Notes | | :--- | :--- | :--- | | | BS26 | Stamped on the body | | Bore Size | 26mm | | | Pilot Jet (Slow Jet) | #35 or #40 | Varies by model year/market | | Main Jet | #110 - #125 | Varies by model (Check specific model manual) | | Jet Needle | 4F17 or 4D01 | Clip position usually 3rd groove from top | | Pilot Screw (Air Screw) | 1-3/4 turns out | Factory Preset; Usually capped | | Float Height | 22.4mm ± 1.0mm | Measured from gasket surface to float tang (float hanging down, just touching needle) | | Idle Speed | 1400 ± 100 RPM | | | Throttle Cable Play | 2–4mm | Free play at the throttle grip |
You will never get a perfect idle with pods on a BS26. Suzuki's engineering notes explicitly state the air box volume (5.8 liters) is required for pressure wave stability.
Hold the carburetor at a 45-to-60-degree angle so the float tang rests lightly against the needle valve spring plunger without compressing it.
Hold the rubber diaphragm up to a bright light. Gently stretch the edges to look for pinholes, tears, or stiffness. If any cracks or holes are found, the diaphragm must be replaced; otherwise, the slide will not lift properly under load. mikuni bs26 carburetor manual verified
The Mikuni BS26 carburetor is a vacuum-piston carburetor designed to provide a precise air-fuel mixture to the engine. It features a simple and rugged design, making it easy to maintain and repair. The BS26 carburetor is commonly used in motorcycles, scooters, and ATVs, but it can also be found in other applications such as go-karts and mini-bikes.
Remove all rubber O-rings, gaskets, and diaphragms. Carburetor cleaner will swell and destroy these rubber parts.
: Controls engine idle and initial throttle opening. | Component | Specification | Notes | |
The Mikuni BS26 carburetor is a reliable and performance-oriented carburetor model. By following the verified guide provided in this article, you can ensure proper adjustment, maintenance, and repair of your Mikuni BS26 carburetor. Remember to consult the official Mikuni carburetor manual and other verified sources for specific information on your carburetor model.
(moving it toward the pointy end) raises the needle, making the mid-range richer .
These verified factory specs provide the baseline for maintenance and tuning: Venturi Diameter : Typically 100–120 (varies by application) : 17.5–25 Needle & Seat : 2.5mm seat / 5.0mm needle stem Float Height : 24mm (Standard for many BS series units) Fuel Requirement : Minimum 87 Octane Petrol Adjustment & Tuning Procedures Hold the rubber diaphragm up to a bright light
Invert the slide to remove the plastic needle retainer, spring, and the jet needle. Step 2: Float Bowl Assembly Disassembly Flip the carburetor upside down.
Controls idle through the pilot jet, pilot air jet, and fuel mixture screw. 3. Step-by-Step Disassembly
Houses the rubber diaphragm, slide, return spring, and needle.
This is the heart of your search for a "Mikuni BS26 carburetor manual verified." Below are the from Suzuki literature. Note that emissions regulations changed by year, so we have listed the most common (1994-2000 GS500 baseline, which applies to most BS26 units).
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