Benelli ZAFFERAN 250, Service Manual

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Note:
High temperature in the fuel injector and its surrounding parts.
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The motorcycle flames out.
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Disconnect the negative pole of the battery to avoid any accidental startup of the engine.
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Remove the fuel injector connector.
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Release fuel pressure.
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Remove the fuel rail from the fuel injector.
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Remove the fuel injector from the air intake pipe.
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Remove the fuel injector retention clamp and the fuel injector from the seat carefully.
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Carefully clean impurities on the contact surface of the fuel injector. Do not damage the contact
surface.
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Apply lubricant to o-rings on both ends of the new fuel injector.
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Install the new fuel injector into the air intake pipe carefully and make sure it is facing the same
direction as the original one is.
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Install the fuel injector seating and the retention clip.
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Tighten mounting bolts with required torque according to the installation manual.
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Install the fuel rail.
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Insert the fuel injector connector.
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Insert the key for power on. Check for fuel leakage from the fuel injector before engine startup.
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Start up the engine to check its operation.
17.2.2.13 Replaceability
Replace the fuel injector with one of the same part number. Part number may change. Please
check the vehicle maintenance manual and the list of spare parts to select a correct fuel injector.
17.2.2.14 Fuel Injector Blocked
Accumulated impurities in the fuel can cause flow deviation and reduction of service life. When
the engine stops working, deposits may be generated in fuel as heat from the engine runs
through the fuel injector head. Deposits accumulated around the fuel injection holes lead to flow
deviation.
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If the fuel injector is blocked, it may cause reduced flow, increased friction and accumulated
impurities, which finally affects emissions and durability.
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Fuel and environmental factors cause fuel crystallization or corrosion to the fuel injector, which
also leads to flow deviation.
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Unsteady fuel oxidation causes the generation of deposits. Please use high-quality gasoline.
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Add a certain amount of fuel injection cleaner to avoid deposits.
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When the fuel injector is blocked, please clean the fuel injector by the following method.
17.2.2.15 Cleaning
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Disconnect the fuel pump first.
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Release fuel pressure and then remove the fuel rail. After the fuel rail is removed, stuff it up with
some material to avoid fuel drainage.
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Add fuel injection cleaner and gasoline proportionally to the fuel injector cleaner tank.
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Connect the fuel injector cleaner tank to the fuel injector.
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Adjust the cleaner fuel pressure to the vehicle system pressure of 2.5bar.
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Start up the engine, and keep it at the idle speed for 15-20 minutes.
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Remove the cleaner tank, and re-install the fuel rail to the fuel injector.
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Start up the engine and keep it at idle for 2 minutes. Ensure cleaner is completely removed.