1999 YAMAHA YZF-R7 Owners Manual

7 - 79
CHAS
CHECKING THE RELAY ARM AND
CONNECTING ARM
1. Check:
• relay arm 1
• connecting arm 2
Damage/wear ® Replace.
• bearings
• oil seals
Damage/pitting ® Replace.
• spacers
Damage/scratches ® Replace.
1
1
2
2

2

2

EB706701
INSTALLING THE REAR SHOCK ABSORBER
ASSEMBLY
1. Lubricate:
• bearings
• oil seals
• spacers
2. Install:
• relay arm
• connecting arms
• rear shock absorber assembly
NOTE:
When installing the rear shock absorber
assembly, lift up the swingarm.
3. Tighten:
• relay arm-to-frame nut
• relay arm-to-connecting arm nut
• connecting arm-to-swingarm nut
• rear shock absorber assembly upper nut
• rear shock absorber assembly lower nut
Recommended lubricant
Molybdenum disulfide grease
T R..40 Nm (4.0 m · kg, 29 ft · lb)
T R..40 Nm (4.0 m · kg, 29 ft · lb)
T R..40 Nm (4.0 m · kg, 29 ft · lb)
T R..40 Nm (4.0 m · kg, 29 ft · lb)
T R..40 Nm (4.0 m · kg, 29 ft · lb)
REAR SHOCK ABSORBER ASSEMBLY

7 - 80
CHAS
EB707000
SWINGARM AND DRIVE CHAIN
Order Job/Part Q’ty Remarks
Removing the swingarm and drive
chainRemove the parts in the order listed.
Drive sprocket Refer to “ENGINE” in chapter 4.
Rear wheel Refer to “REAR WHEEL, BRAKE DISC,
AND REAR WHEEL SPROCKET”.
Rear shock absorber assembly Refer to “REAR SHOCK ABSORBER
ASSEMBLY”.
1 Spacer 1
2 Adjusting bolt/locknut 2/2
3 Left drive chain puller 1
4 Right drive chain puller 1
5 Drive chain guard 1 1
6 Drive chain guard 3 1
7 Brake hose holder 3
8 Pivot shaft nut/washer 1/1
9 Right pivot shaft boss 1
SWINGARM AND DRIVE CHAIN

7 - 81
CHAS
Order Job/Part Q’ty Remarks
10 Pivot shaft 1
11 Left pivot shaft boss 1
12 Swingarm 1
13 Spacer 2
14 Drive chain 1
15 Drive chain guard 2 1
16 Drive chain guide 1
17 Dust cover 2
18 Bearing 2
19 Spacer 1
20 Bearing 2
For installation, reverse the removal
procedure.
SWINGARM AND DRIVE CHAIN

7 - 82
CHAS
EB707100
NOTE:
Before removing the drive sprocket,
drive chain, and rear wheel, measure the
drive chain slack and the length of a ten-
link section of the drive chain.
EB707111
REMOVING THE SWINGARM
1. Stand the motorcycle on a level surface.
WARNINGWARNING
Securely support the motorcycle so that
there is no danger of it falling over.
NOTE:
Place the motorcycle on a suitable stand
so that the rear wheel is elevated.
2. Measure:
• swingarm side play
• swingarm vertical movement
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. Measure the tightening torque of the
pivot shaft nut.
b. Measure the swingarm side play
by moving the swingarm from side to
side.
c. If the swingarm side play is out of
specification, check the spacers, bear-
ings, washers, and dust covers.
d. Check the swingarm vertical move-
ment
õ by moving the swingarm up
and down.
If swingarm vertical movement is not
smooth or if there is binding, check the
spacers, bearings, washers, and dust
covers.
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
T R..
Pivot shaft nut
125 Nm (12.5 m • kg, 90 ft • lb)
Swingarm side play (at the
end of the swingarm)
1.0 mm (0.04 in)
SWINGARM AND DRIVE CHAIN

7 - 83
CHAS
EB707120
REMOVING THE DRIVE CHAIN
1. Remove:
• drive chain
(with the drive chain cutter)
NOTE:
Only cut the drive chain if it or the swin-
garm is to be replaced.
Drive chain cutter
90890-01286
EB707400
CHECKING THE SWINGARM
1. Check:
• swingarm
Bends/cracks/damage ® Replace.
NOTE:
If the swingarm must be replaced, the
drive chain must be cut with a drive
chain cutter.
2. Check:
• pivot shaft
Roll the pivot shaft on a flat surface.
Bends ® Replace.
WARNINGWARNING
Do not attempt to straighten a bent
pivot shaft.
3. Wash:
• pivot shaft
• dust covers
• spacer
• bearings
Recommended cleaning solvent
Kerosine
SWINGARM AND DRIVE CHAIN

7 - 84
CHAS
4. Check:
• dust covers
• spacer
• oil seals
Damage/wear ® Replace.
• bearings
Damage/pitting ® Replace.
EB707410
CHECKING THE DRIVE CHAIN
1. Measure:
• ten-link section a of the drive chain
Out of specification ® Replace the
drive chain.
NOTE:
• While measuring the ten-link section,
push down on the drive chain to
increase its tension.
• Measure the length between drive
chain roller 1 and A as shown.
• Perform this measurement at two or
three different places.
Max. ten-link drive chain sec-
tion
150.1 mm (5.91 in)
2. Check:
• drive chain
Stiffness ® Clean and lubricate or
replace.
3. Clean:
• drive chain
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. Wipe the drive chain with a clean
cloth.
b. Put the drive chain in kerosine and
remove any remaining dirt.
SWINGARM AND DRIVE CHAIN

7 - 85
CHAS
c. Remove the drive chain from the ker-
osine and completely dry it.
ACHTUNG:CAUTION:
This motorcycle has a drive chain with
small rubber O-rings 1 between the
drive chain side plates. Never use high-
pressure water or air, steam, gasoline,
certain solvents (e.g., benzine), or a
coarse brush to clean the drive chain.
High-pressure methods could force dirt
or water into the drive chain’s internals,
and solvents will deteriorate the O-
rings. A coarse brush can also damage
the O-rings. Therefore, use only kero-
sine to clean the drive chain.
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
4. Check:
• O-rings 1
Damage ® Replace the drive chain.
• drive chain rollers 2
Damage/wear ® Replace the drive
chain.
• drive chain side plates 3
Cracks/damage/wear ® Replace the
drive chain.
5. Lubricate:
• drive chain
Recommended lubricant
Engine oil or chain lubricant
suitable for O-ring chains
6. Check:
• drive sprocket
• rear wheel sprocket
More than 1/4 tooth a wear ® Replace
the drive chain sprockets as a set.
Bent teeth ® Replace the drive chain
sprockets as a set.
b Correct
1Drive chain roller
2Drive chain sprocket
SWINGARM AND DRIVE CHAIN

7 - 86
CHAS
EB707700
INSTALLING THE SWINGARM
1. Lubricate:
• bearings
• spacers
• dust covers
• pivot shaft
2. Install:
• spacers
• swingarm
• pivot shaft bosses
• pivot shaft
• washer
• pivot shaft nut
3. Install:
• drive chain pullers
NOTE:
Install the drive chain pullers onto the
swingarm so that the sides stamped
“IN” face toward the inside (i.e., the rear
wheel).
4. Install:
• rear shock absorber assembly
• rear wheel
Refer to “REAR SHOCK ABSORBER
ASSEMBLY” and “REAR WHEEL”.
5. Adjust:
• drive chain slack
Refer to “ADJUSTING THE DRIVE
CHAIN SLACK” in chapter 3.
Recommended lubricant
Molybdenum disulfide grease
Drive chain slack
40 ~ 50 mm (1.57 ~ 1.97 in)
T R..125 Nm (12.5 m · kg, 90 ft · lb)
SWINGARM AND DRIVE CHAIN