clock YAMAHA YZF-R7 1999 User Guide

4 - 14
ENGCAMSHAFTS
2. Check:
• camshaft sprocket
More than 1/4 tooth wear a ® Replace
the camshaft sprockets and the timing
chain as a set.
a1/4 tooth
bCorrect
1Timing chain roller
2Camshaft sprocket
3. Check:
• timing chain guide (exhaust side) 1
• timing chain guide (intake side) 2
• timing chain guide (top side) 3
Damage/wear ® Replace the defective
part(-s).
EB401430
CHECKING THE TIMING CHAIN
TENSIONER
1. Check:
• timing chain tensioner
Cracks/damage/rough movement ®
Replace.
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a. Lightly press the timing chain ten-
sioner rod into the timing chain ten-
sioner housing by hand.
NOTE:
While pressing the timing chain ten-
sioner rod, wind it clockwise with a thin
screwdriver 1 until it stops.
b. Remove the screwdriver and slowly
release the timing chain tensioner
rod.
c. Make sure that the timing chain ten-
sioner rod comes out of the timing
chain tensioner housing smoothly. If
there is rough movement, replace the
timing chain tensioner.
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4 - 15
ENGCAMSHAFTS
EB401701
INSTALLING THE CAMSHAFTS
1. Install:
• timing chain guide (intake side)
2. Install:
• camshaft sprockets 1
(with the flywheel puller 2)
3. Install:
• exhaust camshaft
• intake camshaft
• exhaust camshaft caps
• intake camshaft caps
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a. Turn the crankshaft clockwise.
b. When piston #1 is at TDC on the com-
pression stroke, align the TDC a
mark on the pickup coil rotor with the
crankcase mating surface b.
c. Install the timing chain onto both
camshaft sprockets and then install
the camshaft sprockets onto the cam-
shafts.
ACHTUNG:CAUTION:
Do not turn the crankshaft when install-
ing the camshaft to avoid damage or
improper valve timing.
NOTE:
Make sure that the punch marks c on
the camshafts face up.
d. Install the exhaust and intake cam-
shaft caps.
NOTE:
Make sure that the punch marks c on
the camshafts are aligned with the
arrow marks d on the camshaft caps.
Out of alignment ® Reinstall.
e. Remove the wire from the timing
chain.
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Flywheel puller
90890-01080
T R..
Camshaft cap bolt
10 Nm (1.0 m • kg, 7.2 ft • lb)
T R..24 Nm (2.4 m · kg, 17 ft · lb)
H H
T
T
a
a
b
b

4 - 16
ENGCAMSHAFTS
4. Install:
• timing chain guide (exhaust side)
5. Install:
• timing chain tensioner
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. Lightly press the timing chain ten-
sioner rod into the timing chain ten-
sioner housing by hand.
b. While pressing the timing chain ten-
sioner rod, wind it clockwise with a
thin screwdriver 1 until it stops.
c. With the screwdriver still inserted
into the timing chain tensioner, install
the timing chain tensioner and gasket
onto the cylinder block. Then, tighten
the timing chain tensioner bolts to the
specified torque.
WARNINGWARNING
Always use a new gasket.
NOTE:
The “UP” mark on the timing chain ten-
sioner should face up.
d. Remove the screwdriver, make sure
that the timing chain tensioner rod
releases, and tighten the cap bolt to
the specified torque.
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T R..
Timing chain tensioner bolt
10 Nm (1.0 m • kg, 7.2 ft • lb)
T R..
Cap bolt
10 Nm (1.0 m • kg, 7.2 ft • lb)
6. Turn:
• crankshaft
(several turns counterclockwise)

4 - 45
ENGCLUTCH
2. Check:
• back torque limiter clutch
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a. Install the back torque limiter bearing
and back torque limiter outer boss
onto the back torque limiter inner
boss and hold the back torque limiter
inner boss.
b. When turning the back torque limiter
outer boss clockwise , the back
torque limiter inner boss and back
torque limiter outer boss should
engage, otherwise the back torque
limiter is faulty and must be replaced.
c. When turning the back torque limiter
outer boss counterclockwise õ, it
should turn freely, otherwise the back
torque limiter is faulty and must be
replaced.
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CHECKING THE STARTER CLUTCH
1. Check:
• starter clutch gear
• starter clutch idle gear
Chips/pitting/roughness/wear ®
Replace the defective part(-s).
2. Check:
• starter clutch operation
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a. Install the starter clutch gear 1 onto
the starter clutch2 and hold the
starter clutch.
b. When turning the starter clutch gear
clockwise , the starter clutch and
the starter clutch gear should engage,
otherwise the starter clutch is faulty
and must be replaced.
c. When turning the starter clutch gear
counterclockwise õ, it should turn
freely, otherwise the starter clutch is
faulty and must be replaced.
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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