2005 Yamaha Motorsports RS Vector Owners Manual - Page 60
2005 Yamaha Motorsports RS Vector Manual
Page 60 highlights
Main jet replacement Replace the main jet according to the setting chart which is available at a Yamaha dealer. WARNING @ G G G @ Never remove the drain plug or the float chamber while the engine is hot. Fuel will flow out from the float chamber which could ignite and cause injury. Place a rag under the carburetor before removing the drain plug or float chamber to catch any spilled fuel. Handle fuel with care: it is HIGHLY FLAMMABLE. Standard main jet: # 148 CD-04E Main jet 1 Small No. Large No. Mixture Lean Rich Condition Warm weather High altitude Cold weather Low altitude 1. Loosen the carburetor clamps and remove all hoses and cables, and then remove the carburetor. 2. Pinch the fuel hose to prevent fuel flowing. 3. Remove the float chamber and install the proper main jet. 4. Assemble by reversing the removal steps. WARNING @ Make sure that all hoses and clamps are properly installed. @ 8-8