Yamaha XT660R Service Manual

FI
CHAPTER 7
FUEL INJECTION SYSTEM
FUEL INJECTION SYSTEM
............................................................................7-1
WIRING DIAGRAM ...................................................................................7-2
ECU SELF-DIAGNOSTIC FUNCTION......................................................7-3
ALTERNATE OPERATION CONTROL (FAIL-SAFE ACTION) ................7-4
FAIL-SAFE ACTION TABLE .....................................................................7-4
TROUBLESHOOTING CHART .................................................................7-6
DIAGNOSTIC MODE ................................................................................7-7
TROUBLESHOOTING DETAILS ............................................................7-12
THROTTLE BODY ASSEMBLY
....................................................................7-23
CHECKING THE FUEL INJECTOR ........................................................7-26
CHECKING THE THROTTLE BODY ......................................................7-26
INSTALLING THE THROTTLE BODY ASSEMBLY................................7-27
CHECKING THE FUEL PUMP................................................................7-28
CHECKING AND ADJUSTING THE THROTTLE POSITION
SENSOR ................................................................................................7-29
AIR INDUCTION SYSTEM
............................................................................7-32
AIR INJECTION.......................................................................................7-32
AIR CUT-OFF VALVE .............................................................................7-32
AIR INDUCTION SYSTEM DIAGRAMS.................................................. 7-33
AIR CUT-OFF VALVE ASSEMBLY.........................................................7-34
CHECKING THE AIR INDUCTION SYSTEM..........................................7-36

Yamaha XT660R Specifications

General

Displacement	660cc
Bore x Stroke	100.0 mm x 84.0 mm
Compression Ratio	10.0:1
Fuel System	Electronic Fuel Injection
Ignition System	TCI
Starter System	Electric
Transmission	5-speed
Final Drive	Chain
Rear Suspension	Swingarm
Front Tire	90/90-21
Rear Tire	130/80-17
Length	2, 240 mm
Width	865 mm
Height	1, 230 mm
Seat Height	865 mm
Wet Weight	181 kg
Fuel Capacity	15 liters
Lubrication System	Dry sump
Engine Type	Liquid-cooled, 4-stroke, SOHC, 4-valve
Front Suspension	Telescopic fork
Front Brake	Single disc, 298 mm
Rear Brake	Single disc, 245 mm
Maximum Power	35 kW (48 PS) @ 6, 000 rpm
Maximum Torque	58 Nm @ 5, 250 rpm