If your bike is hard to start or won't idle without the choke, this is a classic sign of a clogged pilot circuit, usually from old fuel or sitting for long periods. A thorough cleaning and rebuild (including the pilot jet and its passages) is the only permanent fix.
When rebuilding, to prevent fuel leaks. Steps for Assembly
Reinstall the main jet and pilot jet. Ensure the jet holder is tightened securely. mikuni bds26 service manual
If you can tell me what you are experiencing (e.g., hard starting, stalling at idle, high speed hesitation), I can provide more specific troubleshooting advice. Alternatively,
Crucial for removing bowl screws without stripping them. If your bike is hard to start or
Before diving into the manual, let’s establish the hardware. The Mikuni BDS26 is a with a 26mm bore. Unlike traditional slide carburetors, the BDS series uses engine vacuum to lift the slide, offering smoother throttle response in variable load conditions like deep snow or uneven terrain.
To replace the jets, follow the float bowl removal steps in . The main and pilot jets are immediately visible. A complete re-jetting is typically only required if you have modified both the intake and exhaust systems. Steps for Assembly Reinstall the main jet and pilot jet
Usually a vacuum leak, worn diaphragms, or incorrect synchronization. Where to Find Genuine Parts & Manuals
For detailed exploded views and parts ordering, refer to the Mikuni Carburetor Resources page and the ATKUSA GV250 Service Manual section .
This step-by-step process, derived from owner manuals and expert rebuild guides, will take you through the complete process.