Transcription of Mikuni HS40
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Mikuni HS40 Tuning manual , Exploded View and Parts ListFigure 1: Diagram showing the effective range of the each tuning component of the Mikuni HS40 carburetorIDLE CIRCUIT (PILOT SYSTEM) The idle circuit supplies fuel at idle speeds and has a major influence on fuel flow up to 1/4 throttle. There are three tunable parts in the idle circuit:1) PILOT JET --- controls maximum fuel flow through the idle ) PILOT AIR JET--- controls the maximum amount of fuel that will flow through the pilot jet by allowing a higher (smaller air jet) or lower (large air jet) vacuum signal at the pilot ) PILOT SCREW --- controls how much fuel is allowed to enter the carburetor venturi. The pilot screw is used to control idle mixture. Turn the screw out to richen the idle mixture.
Mikuni HS40 Tuning Manual, Exploded View and Parts List Figure 1: Diagram showing the effective range of the each tuning component of the Mikuni HS40 carburetor IDLE CIRCUIT (PILOT SYSTEM)
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