1999 YAMAHA YZF-R7 sensor

ENG

4 - 5
ENGINE
Order Job/Part Q’ty Remarks
3 Crankcase breather hose 1
4 Ignition coil 4
5 Camshaft sensor 1
6 Starter motor lead 1 Disconnect.
7 Ground lead 1 Disconnect.
8 Starter motor 1
9 Pickup coil coupler 1 Disconnect.
10 Plastic clip 1
11 Stator coil assembly coupler 1 Disconnect.
12 Sidestand switch coupler 1
13 Oil level switch connector 1 Disconnect.
14 Neutral switch 1
For connecting, reverse the disconnec-
tion procedure.

5 - 4
COOL

RADIATOR AND THERMOSTAT
Order Job/Part Q’ty Remarks
3 Thermostat assembly breather hose 1
4 Coolant temperature sensor 1
5 Copper washer 1
6 Plastic band 1
7 Thermostat assembly inlet pipe 1
For installation, reverse the removal
procedure.

6 - 1
EFI

ELECTRONIC FUEL INJECTION
ELECTRONIC FUEL INJECTION
ELECTRONIC FUEL INJECTION
Order Job/Part Q’ty Remarks
Removing the injector 2 assembly
and air filter case
Remove the parts in the order listed.
Air filter case cover Refer to “FUEL TANK AND AIR FIL-
TER” in chapter 3.
1 Crankcase breather hose 1 Disconnect.
2 Fuel hose 3
3 Injector 2 sub-lead coupler 3 Disconnect.
4 Pressure sensor hose 2 Disconnect.
5 Plastic band 1
6 Injector 2 assembly 1
7 Spacer 6
8 Air funnel 4
9 Air funnel bracket 4
10 Fuel hose joint pipe 1
6

6 - 2
EFI

ELECTRONIC FUEL INJECTION
Order Job/Part Q’ty Remarks
11 Intake air temperature sensor 1
12 Copper washer 1
13 Air filter case breather hose 1 Disconnect.
14 Negative pressure hose 1 Disconnect.
15 Air funnel rubber seat 4
16 Air filter case 1
For installation, reverse the removal
procedure.
6

6 - 3
EFI

T R..30 Nm (3.0 m • kg, 22 ft • Ib)
T R..8 Nm (0.8 m • kg, 5.8 ft • Ib)
T R..5 Nm (0.5 m • kg, 3.6 ft • Ib)
T R..8 Nm (0.8 m • kg, 5.8 ft • Ib)
(4)
1
2
3
4
5 6
7
10
9 8
11
2012
14
11
12
13
15
19
16
18
17
LTLT
LTLT
LTLT

ELECTRONIC FUEL INJECTION
Order Job/Part Q’ty Remarks
Removing the injector 2
Remove the parts in the order listed.
1 Intake air pressure sensor coupler 1
2 Atmospheric pressure sensor cou-
pler1
3 Cylinder #1 – injector 2 coupler 1
4 Cylinder #2 – injector 2 coupler 1
5 Cylinder #3 – injector 2 coupler 1
6 Cylinder #4 – injector 2 coupler 1
7 Pressure sensor hose 2
8 Intake air pressure sensor 1
9 Atmospheric pressure sensor 1
10 Pressure sensor bracket 1
11 Union bolt 2
12 Washer 4

6 - 5
EFI

ELECTRONIC FUEL INJECTION
Order Job/Part Q’ty Remarks
Removing the throttle body assem-
bly
Remove the parts in the order listed.
1 Fuel hose 1
2 Throttle position sensor coupler 1
3 Cylinder #4 – injector 1 coupler 1
4 Cylinder #3 – injector 1 coupler 1
5 Cylinder #2 – injector 1 coupler 1
6 Cylinder #1 – injector 1 coupler 1
7 Starter cable 1 Disconnect.
8 Throttle cable 2 Disconnect.
9 Throttle stop screw 1 Disconnect.
10 Throttle body assembly 1
11 Left plate 4
12 Right plate 4

6 - 8
EFI

ELECTRONIC FUEL INJECTION
Order Job/Part Q’ty Remarks
14 Throttle position sensor 1
15 Throttle cable holder 1
16 Starter link lever screw 4
17 Starter link 1
18 Starter link lever 4
19 Front connecting plate 1
20 Throttle body 4
21 Starter plunger 4
22 Air screw 4
For installation, reverse the removal
procedure.

6 - 10
EFI

ELECTRONIC FUEL INJECTION
CHECKING THE PRESSURE REGULATOR
1. Check:
• pressure regulator
Damage
®
Replace.
EAS00502
CHECKING AND ADJUSTING THE
THROTTLE POSITION SENSOR
NOTE:

Before adjusting the throttle position
sensor, the engine idling speed should
be properly adjusted.
1. Check:
• throttle position sensor
(installed on the throttle body)
t t t t t t t t t t t t t t t t t t t t t t t t t t t
a. Disconnect the throttle position sen-
sor coupler from the throttle position
sensor.
b. Connect the pocket tester (
W

´
1k) to
the throttle position sensor.
c. Measure the maximum throttle posi-
tion sensor resistance.
Out of specification
®
Replace the
throttle position sensor.
Positive tester probe
®

blue terminal
1
Negative tester probe
®

black/blue terminal
2
Maximum throttle position
sensor resistance
4.0 ~ 6.0 k
W
at 20 ˚C (68 ˚F)
(blue — black/blue)
B/LYL
231