YAMAHA TT600RE 2004 Service Manual

4-66
CHASSTEERING
3. Install:
•Ring nut (lower) (1)
Use the ring nut wrench (2).
Ring nut wrench: 90890-01268
NOTE:
Apply the lithium soap-base grease to the steer-
ing axle thread.
Lower ring nut tightening steps:
•Tighten the ring nut (1) using the ring nut
wrench.
Ring nut (lower)
(initial tightening): 38 Nm (3.8 mkg)
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•Loosen the ring nut completely and retighten
it to specification.
WARNING
Do not tighten excessively.
Ring nut (lower)
(final tightening): 4 Nm (0.4 mkg)
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4. Check the steering axle by turning it lock to lock. If there is any binding, remove the steer-
ing axle assembly and inspect the steering
bearings.
5. Install:
•Ring nut (upper) (1)
•Special washer (2)
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CHASSTEERING
4-67
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Installation steps:
•Install the ring nut (upper) (1).
•Finger tighten the ring nut (upper), then align
the slots of both ring nuts. If not aligned, hold
the lower ring nut and tighten the other until
they are aligned.
•Install the special washer.
NOTE:
Make sure the special washer tabs are in the
slots.
6. Install:
•Upper bracket
•Fork legs (left and right) (1)
NOTE:
Temporarily install the under bracket pinch bolt to
achieve the correct fork position.
Front fork top end (a) (standard): 0 mm
7. Install:
•Plate washer (1)
•Steering axle nut (2)
Use the lock nut wrench (4).
Lock nut wrench (4):
90890-01348
NOTE:
Set the torque wrench to the lock nut wrench so that
they form a right angle.
Steering axle nut: 115 Nm (11.5 mkg)
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STEERING
4-68
CHAS
8. After tightening the nut, check the steering for smooth movement. If it is not smooth, adjust
by progressively loosening the (lower) ring
nut.
9. Tighten:
•Pinch bolts (upper and lower bracket)
Pinch bolt (upper bracket): 28 Nm (2.8 mkg)
Pinch bolt (under bracket): 23 Nm (2.3 mkg)
Fitting nut (handle lower holder): 40 Nm (4.0 mkg)
Flange bolt (handlebar holder): 20 Nm (2.0 mkg)
NOTE:
Always tighten the lower pinch bolt (to the pre-
scribed torque) and then the upper one (to the
prescribed torque) and then retighten the lower
one (to the prescribed torque).
Tighten the pinch bolt to specified torque. If
torqued too much, it may cause malfunction-
ing of the front fork.
10. Install:
•Handlebar holder
•Handlebar
•Handlebar upper holder
CAUTION:
First tighten the front bolt on the handlebar
holder, then tighten the rear bolt.
CAUTION:
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CHASREAR SHOCK ABSORBER
4-69
Order Job name/Part name Q.ty Remarks Shock absorber removal Remove the parts in order.
WARNING
Securely support the motorcycle so
there is no danger of it falling over.
Seat Refer to “SEAT, FUEL TANK AND REAR
Fuel tank
Rear cowling COWLING” section in Chapter 3.
Battery leads 2 Disconnect. NOTE:
First, disconnect the negative lead, then the
positive lead.
1 Muffler 1
2 Exhaust pipe assembly 1 Refer to “REAR SHOCK ABSORBER RE-
3 Rear frame 1 MOV AL” section.
4 Brake fluid reserve tank 1 Secure the brake fluid tank to the frame in
5 Air filter case 1 an upright position to avoid air entering the hydraulic system.
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REAR SHOCK ABSORBER
4-70
CHAS
Order Job name/Part name Q.ty Remarks 6 Lower bolt 1
7 Upper bolt 1 Reverse the removal procedure for instal-
lation.
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CHASREAR SHOCK ABSORBER
4-71
(1) Rear shock absorber
(2) Spring
(3) Spring adjuster ring nut
(4) Lock ring nut
(5) End of stroke buffer
(6) Special spanner
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REAR SHOCK ABSORBER
4-72
CHAS
WARNING
This shock absorber contains high-pressure
nitrogen gas. Read the following information
carefully before handling it. The manufacturer
cannot be held responsible for any damage or
injury that may result from improper handling.
•Never tamper with or attempt to open the
cylinder or the tank.
•Never expose the shock absorber to a
naked flame or other source of heat. This
might cause the pressurised gas to
explode.
•Do not deform or damage the cylinder in
any way. Damage to the cylinder would
impair the damping effect.
•Be careful not to scratch the surface of the
rod: this would cause the oil to leak.
•Before disposing of the shock absorber,
read the section “NOTES ON DISPOSAL”.
NOTE ON DISPOSAL
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Before neutralising the rear shock absorber:
The gas pressure must be discharged before dis-
posing of the shock absorber it is necessary to dis-
charge the gas pressure. To do this, bore a hole of
2~3 mm through the cylinder wall about 15~20
mm from the bottom of the gas chamber.
WARNING
Wear protective goggles to avoid eye injuries
from escaping gas and/or metal chips.
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CHASREAR SHOCK ABSORBER
4-73
SHOCK ABSORBER REMOVAL
WARNING
Support the motorcycle securely to prevent it
from falling over.
1. Park the motorcycle on a level surface.
2. Remove:
•Seat
•Rear cowling
•Fuel tank
See section “SEAT, FUEL TANK AND
REAR COWLING” in CHAPTER 3.
3. Disconnect:
•Battery leads
8. Remove:
•Upper mounting bolt (1)
•Rear shock absorber
1
NOTE:
First, disconnect the negative lead, then the posi-
tive lead.
4. Remove:
•Exhaust pipe assembly
•Rear frame
•Air filter case
5. Raise the rear wheel placing a suitable sup- port under the engine.
6. Remove:
•Rear wheel
Refer to “REAR WHEEL REMOVAL” sec-
tion.
7. Remove:
•Shock absorber fastening nut (1)
•Lower mounting bolt
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REAR SHOCK ABSORBER
4-74
CHAS
SHOCK ABSORBER INSPECTION
1. Inspect:
•Shock absorber
Oil leak/Damaged ➔Replace.
REAR SHOCK ABSORBER ADJUSTMENT
This shock absorber is equipped with a spring pre-
load adjuster.



 

Never attempt to turn an adjusting mecha-
nism beyond the maximum or minimum set-
tings.
CAUTION:
Adjust the spring preload as follows.
1. Loosen the locknut.
2. To increase the spring preload and thereby harden the suspension, turn the adjusting nut
in direction a. To decrease the spring preload
and thereby soften the suspension, turn the
adjusting nut in direction b.
NOTE:
•Use the special wrench included in the
owner's tool kit to make the adjustment.
•The spring preload setting is determined by
measuring distance A, shown in the illustra-
tion. The longer distance A is, the lower the
spring preload; the shorter distance A is, the
higher the spring preload. With each com-
plete turn of the adjusting nut, distance A
changes by 1.5 mm.
Spring preload: Minimum (soft):Distance A = 217 mm
Standard: Distance A = 211 mm
Maximum (hard): Distance A = 205 mm
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CHASREAR SHOCK ABSORBER
4-75
2. Tighten the locknut to the specified torque. Locknut: 45 Nm (4.5 m·kgf)
Always tighten the locknut against the adjust-
ing nut, and then tighten the locknut to the
specified torque.
CAUTION:
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