13. FUEL INJECTION SYSTEM
13-1
Downtown 300i ABS
SERVICE INFORMATION
GENERAL INSTRUCTIONS
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Scooter services can be done with the engine installed in the frame.
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Be sure to relieve the fuel pressure before fuel pump or fuel hose removal.
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Bending or twisting the control cables will affect operation and could cause the cables to stick or
bind, resulting in loss of vehicle control.
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Work in a fully ventilated area. Smoking or allowing flames or sparks in the work area or where
gasoline is stored can cause a fire or explosion.
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Do not apply the Carburetor Cleaners to the inside of the throttle body, which is coated with
molybdenum.
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Do not snap the throttle valve from fully open to fully close after the throttle cable has been
removed; it may cause incorrect idle speed.
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Do not loosen or tighten the painted bolts and screws of the throttle body. Loosening or tighten
them can cause throttle and idle valve synchronization failure.
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Seal the cylinder head intake ports with tape or a clean towel to prevent dirt and debris from
entering the intake ports after the throttle body has been removed.
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Do not damage the throttle body.
It may cause incorrect throttle and idle valve synchronization.
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Do not take the fuel pump on the ground downward.
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Always replace the packing when the fuel pump is removed.
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The electronic fuel injection system is equipped with the self-diagnostic system. If the Check
Engine Lamp “CELP” illuminate while riding, follow the self-diagnostic procedures to solve the
problem.
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A faulty AFI problem is often related to poorly connected or corroded connectors. Check those
connections before proceeding.
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When disassembling the fuel injection parts, note the location of the O-rings. Replace them with
new ones upon reassembly.
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Do not disconnect the battery negative (-) or positive (+) cable while engine is running, it may
cause ECU damage.
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Do not disconnect or connect the ECU connector during the ignition switch “ON”; it may
cause the ECU damage.
Summary of Contents for Downtown 300i ABS
Page 10: ...1 GENERAL INFORMATION 1 7 Downtown 300i ABS TORQUE VALUES...
Page 11: ...1 GENERAL INFORMATION 1 8 Downtown 300i ABS TORQUE VALUES FRAME...
Page 17: ...1 GENERAL INFORMATION 1 14 Downtown 300i ABS ISC Throttle Body TPS WTS Injector MAP Sensor...
Page 19: ...1 GENERAL INFORMATION 1 16 Downtown 300i ABS Starter Relay Regulator Rectifier CPS O2 Sensor...
Page 43: ...3 INSPECTION ADJUSTMENT 3 2 Downtown 300i ABS...
Page 69: ...6 CYLINDER HEAD VALVES 6 1 Downtown 300i ABS SCHEMATIC DRAWING...
Page 81: ...7 CYLINDER PISTON 7 1 Downtown 300i ABS SCHEMATIC DRAWING...
Page 89: ...8 DRIVE AND DRIVEN PULLEYS V BELT 8 1 Downtown 300i ABS SCHEMATIC DRAWING...
Page 103: ...9 FINAL REDUCTION 9 1 Downtown 300i ABS SCHEMATIC DRAWING...
Page 109: ...10 A C GENERATOR STARTER CLUTCH 10 1 Downtown 300i ABS SCHEMATIC DRAWING...
Page 119: ...11 CRANKCASE CRANKSHAFT 11 1 Downtown 300i ABS SCHEMATIC DRAWING...
Page 125: ...12 COOLING SYSTEM 12 1 Downtown 300i ABS SCHEMATIC DRAWING...
Page 206: ...15 REAR WHEEL REAR BRAKE REAR SUSPENSION Downtown 300i ABS 15 8...
Page 227: ...19 LIGHTS SWITCHES FUEL PUMP 19 1 Downtown 300i ABS ELECTRICAL EQUIPMENT LAYOUT Radiator...
Page 235: ......
