Mikuni Bs26 Carburetor Manual Verified Jun 2026

If the engine cuts out or loses power at wide-open throttle, change the main jet size. A white plug tip indicates a lean condition requiring a larger main jet number. A dark soot-covered plug tip indicates a rich condition requiring a smaller main jet number. Comprehensive Troubleshooting Matrix Primary Root Cause Verified Corrective Action Engine will not start; dry spark plug Clogged pilot jet or blocked fuel inlet needle valve.

| Circuit | Typical BS26 range | GS500 (1996–2000) | |---------|-------------------|--------------------| | Pilot jet | 35 – 45 | 37.5 | | Main jet | 120 – 140 | 125 | | Pilot air jet | 80 – 120 | 95 | | Needle clip position | Groove 1–5 | 3rd from top |

Based on the search term you are likely looking for the official specifications, tuning data, and exploded diagrams for the Hitachi/Mikuni BS26 carburetor (commonly found on Suzuki DR, GN, and Honda CD/Trike motorcycles).

As air rushes through the venturi, it creates a pressure drop (vacuum) above the rubber diaphragm. mikuni bs26 carburetor manual verified

Remove the jet needle from inside the slide, noting the order of any washers or spacers. Step 3: Float Bowl and Jet Disassembly (Bottom Section)

Typically range from #90 to #110 depending on the specific vehicle model. Pilot Jet: Often #15 to #20. Idle Speed: Standard range is between 1,400 and 1,500 RPM. Air/Fuel Mixture Screw:

This article provides . We have cross-referenced part numbers, torque specs, and tuning parameters to give you the definitive guide to rebuilding, tuning, and troubleshooting the BS26. If the engine cuts out or loses power

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The is a Constant Velocity (CV) carburetor widely used on 125cc to 150cc motorcycles and ATVs, such as the Suzuki GN125 and GS125.

Insert the dry slide back into the carburetor body without the spring. Lift it manually and let go. It must drop smoothly under its own weight without catching. Float Height Calibration Remove the jet needle from inside the slide,

This is often caused by an air leak. Spray starter fluid around the intake boot; if the RPMs jump, you have a leak. 6. Pro-Tip: The "Vacuum Test"

Prior to disassembly, thoroughly clean the exterior of the carburetor with a dedicated carburetor cleaning spray to prevent dirt from entering the internal passages. 1. Top Cover and Diaphragm Removal Remove the two top cover screws.