6.Fuel System
AK 550
6-2
GENERAL INSTRUCTIONS
● Scooter services can be done with the engine installed in the frame.
● Be sure to relieve the fuel pressure before fuel pump or fuel hose removal.
● Bending or twisting the control cables will affect operation and could cause the
cables to stick or bind, resulting in loss of vehicle control.
● 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.
● Do not apply the Carburetor Cleaners to the inside of the throttle body, which
is coated with molybdenum.
● 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.
● 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.
● 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.
● Do not damage the throttle body. It may cause incorrect throttle and idle valve
synchronization.
● Do not take the fuel pump on the ground downward.
● Always replace the packing when the fuel pump is removed.
● 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.
● A faulty AFI problem is often related to poorly connected or corroded
connectors. Check those connections before proceeding.
● When disassembling the fuel injection parts, note the location of the O-rings.
Replace them with new ones upon reassembly.
● Do not disconnect the battery negative (-) or positive (+) cable while engine is
running, it may cause ECU damage.
●
Do not disconnect or connect the ECU connector during the ignition
switch “ON”; it may cause the ECU damage.
Summary of Contents for AK 550
Page 23: ...1 Quick Reference AK 550 1 14 Engine Torque Specifications...
Page 24: ...1 Quick Reference AK 550 1 15 Frame Torque Specifications...
Page 27: ...1 Quick Reference AK 550 1 18 General Troubleshooting...
Page 28: ...1 Quick Reference AK 550 1 19...
Page 29: ...1 Quick Reference AK 550 1 20...
Page 30: ...1 Quick Reference AK 550 1 21...
Page 31: ...1 Quick Reference AK 550 1 22 VIN and Engine Number Location Engine Number VIN Number...
Page 89: ...3 External Components AK 550 3 12...
Page 109: ...4 Engine AK 550 Engine Torque Specifications 4 5...
Page 110: ...4 Engine AK 550 4 6...
Page 114: ...4 Engine AK 550 Installation torque 1 1 4 kgf m 9 8 13 7 N m 4 10...
Page 125: ...4 Engine AK 550 CVT Removal SCHEMATIC DRAWING 4 21...
Page 134: ...4 Engine AK 550 Remove the gaskets of CVT case Replace with new gaskets when installation 4 30...
Page 148: ...4 Engine AK 550 Remove the washer Wet Clutch Disassembly Remove the C clip 4 44...
Page 222: ...6 Fuel System AK 550 6 35 Remove the throttle body...
Page 246: ...7 CVT Continuously Variable Transmission AK 550 SCHEMATIC DRAWING 7 2...
Page 273: ...9 Electrical Systems AK 550 9 8 Component Location...
Page 298: ...9 Electrical Systems AK 550 9 33 Check the circuit following below wiring dirgram...
Page 305: ...9 Electrical Systems AK 550 9 40...
Page 314: ...9 Electrical Systems AK 550 9 49 Lights Wiring Diagram...
Page 318: ...9 Electrical Systems AK 550 9 53 Check the circuit referring to the following diagram...
Page 330: ...9 Electrical Systems AK 550 9 65 Check the wiring diagram to inspect the circuit...
Page 334: ...10 Brake System AK 550 Diagram 10 3...
Page 357: ...10 Brake System AK 550 Pre diagnosis Inspection Chart 1 10 26...
Page 358: ...10 Brake System AK 550 Pre diagnosis Inspection Chart 2 10 27...
Page 379: ...11 Steering AK 550 Remove the washer of bottom bridge 11 7...
Page 404: ...13 Rear Suspension AK 550 13 12 Slide out the rear wheel assembly...
Page 432: ...14 Wheels AK 550 14 16 Slide out the rear wheel assembly...