The is a Constant Velocity (CV) carburetor widely used in small-to-medium displacement motorcycles and ATVs, such as the Suzuki GN250 and Hyosung GT250. Unlike mechanical slide carburetors, CV carburetors use engine vacuum to lift the throttle slide, providing smoother power delivery and better fuel efficiency.
Small brass tube that controls fueling from idle up to 1/4 throttle. 3. Disassembly and Inspection Steps
For a full step-by-step disassembly guide, you can view the Mikuni BS Rebuild Tutorial . How-To: Adjust FLOAT Height & Clear Tube Method
This verified manual and technical guide provides factory specifications, tuning procedures, and troubleshooting steps for the Mikuni BS26. Technical Specifications and Factory Settings mikuni bs26 carburetor manual verified
Use a tight-fitting slot screwdriver to remove the main jet, needle jet holder, and recessed pilot jet. 4. Thorough Cleaning Methods
┌────────────────────────┐ <-- Carburetor Body Gasket Surface │ || │ │ || │ │ ┌─┴┴─┐ │ │ │====│ <--------- Needle Valve Hook │ ┌┴────┴┐ │ │ │ ┌──┐ │ <--------- Float Tang / Metal Tab │ ┌───┘ │ │ └───┐ │ │ / │ └──┘ │ \ │ │ / │ │ \ │ [ ]==X====X X====X==[ ] <-- Float Pontoons │ │ │ <--- MEASURE HERE ---> │ <-- Target: 21.4mm Reassembling the Top Slide
An incorrect float height is a primary cause of rich or lean running conditions that are often misdiagnosed as jetting problems. It's a simple but critical adjustment. The is a Constant Velocity (CV) carburetor widely
Every "verified" manual warns about this: The BS26 uses a fine-tip screw with a tiny O-ring and washer.
When your engine stumbles, hesitates, or refuses to idle, a verified factory manual approach is essential to restore performance. This comprehensive technical guide serves as your verified workshop reference for rebuilding, tuning, and troubleshooting the Mikuni BS26. 1. Core Specifications and Identification
A successful rebuild requires understanding the anatomy of the BS26. The unit divides into three primary sections: Top Cap Assembly Held by two or pressure-sealed screws. Slide Spring: Returns the slide down when vacuum drops. Before diving into specs
Mikuni BS26 Carburetor: The Ultimate Maintenance & Tuning Manual
Turn the pilot screw in/out in 1/2 turn increments every 10 seconds until the engine reaches its highest, steadiest idle.
Before diving into specs, it’s crucial to understand what the Mikuni BS26 is. It’s a constant velocity (CV) carburetor, which sets it apart from a conventional slide carburetor.