2002 Yamaha Motorsports SXViper Owners Manual - Page 61

Jet needle adjustment Adjust the jet needle by changing its clip position according to the setting chart which is available at a Yamaha dealer. Standard jet needle clip 1 position: 3rd groove from upper end CD-03E Clip position Mixture Lean Rich Condition Warm weather High altitude Cold weather Low altitude 2 Upper end 3 Lower end 1. Remove the top cover of the carburetor and jet needle. 2. Change the clip to the proper position. Make sure that the plastic washer is in place below the clip. WARNING @ Make sure that the throttle outer cable is firmly seated in the holder and the throttle operates smoothly after assembling the carburetor. @ 3. Assemble by reversing the removal steps. 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. 8-8