headlights YAMAHA YZF-R7 1999 Owners Manual

3 - 63
CHK
ADJ
ADJUSTING THE HEADLIGHT BEAMS
EB305061
ADJUSTING THE HEADLIGHT BEAMS
The following procedure applies to both of
the headlights.
1. Adjust:
• headlight beam (vertically)
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. Turn the adjusting screw 1 in direc-
tion a or b.
s s s s s s s s s s s s s s s s s s s s s s s s s s s
Direction aHeadlight beam is raised.
Direction bHeadlight beam is low-
ered.
2. Adjust:
• headlight beam (horizontally)
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. Turn the adjusting screw 1 in direc-
tion a or b.
Left headlight
Right headlight
s s s s s s s s s s s s s s s s s s s s s s s s s s s
Direction aHeadlight beam moves
to the right.
Direction bHeadlight beam moves
to the left.
Direction aHeadlight beam moves
to the left.
Direction bHeadlight beam moves
to the right.

8 - 4
–+ELECCHECKING THE BULBS AND BULB SOCKETS
EB801020
CHECKING THE BULBS AND
BULB SOCKETS
Check each bulb and bulb socket for dam-
age or wear, proper connections, and also
for continuity between the terminals.
Damage/wear ® Repair or replace the
bulb, bulb socket or both.
Improperly connected ® Properly con-
nect.
Incorrect continuity reading ® Repair or
replace the bulb, bulb socket or both.
TYPES OF BULBS
The bulbs used on this motorcycle are
shown in the illustration on the left.
• Bulbs A and B are used for headlights
and usually use a bulb holder which must
be detached before removing the bulb.
The majority of these bulbs can be
removed from their respective socket by
turning them counterclockwise.
• Bulb C is used for turn signal and tail/
brake lights and can be removed from the
socket by pushing and turning the bulb
counterclockwise.
• Bulbs
D and E are used for meter and
indicator lights and can be removed from
their respective socket by carefully pulling
them out.
CHECKING THE CONDITION OF THE BULBS
The following procedure applies to all of
the bulbs.
1.Remove:
• bulb

8 - 18
–+ELECCHARGING SYSTEM
MEASURING THE CHARGING VOLTAGE
• Connect the engine tachometer to the
ignition coil of cylinder #1.
Refer to “SYNCHRONIZING THE THROT-
TLE BODIES” in chapter 3.
• Connect the pocket tester (DC 20V) to the
battery as shown.
• Start the engine and let it run at approxi-
mately 1,100 r/min.
• Measure the charging voltage.
NOTE:
• Make sure that the battery is fully
charged.
• When measuring, turn off the headlights
and make sure that no load is applied.
• Is the charging voltage within specifica-
tion?
Yes ® OK.
No ® Measure the stator coil assembly
resistance. Tester positive probe ®
battery positive terminal
Tester negative probe ®
battery negative terminal
Charging voltage
12 V at 1,100 r/min
MEASURING THE STATOR COIL
ASSEMBLY RESISTANCES
• Disconnect the generator coupler from
the wire harness.
• Connect the pocket tester (W ´ 1) to the
stator coil assembly coupler as shown.
• Measure the stator coil assembly resis-
tances.
• Is the stator coil assembly OK?
Yes ® OK.
No ® Replace. Tester positive probe ® white 1
Tester negative probe ® white 2
Tester positive probe ® white 1
Tester negative probe ® white 3
Stator coil resistance
0.38 ~ 0.46 W at 20˚C (68 ˚F)