warning YAMAHA TTR50 2006 Owner's Manual

5 - 13
CHASSTEERING AND FRONT SUSPENSION
EC560000
STEERING AND FRONT SUSPENSION
Extent of removal:1 Lower bracket removal
2 Bearing removal
3 Inner table assembly removal
Extent of removal Order Part name Q ’ty Remarks
STEERING AND FRONT SUS-
PENSION REMOVAL
WARNING
Support the machine securely so
there is no danger of it falling over.
Preparation for removal Hold the machine by placing the
suitable stand under the engine.
Front wheel Refer to “FRONT WHEEL AND REAR
WHEEL ” section.
Handlebar Refer to “HANDLEBAR ” section.
1 Cable guide 1
2 Reflector 2 For Canada
3 Steering stem nut 1
4 Upper bracket 1
5 Special washer 1 Use special tool. Refer to “STEERING HEAD INSPEC-
TION AND ADJUSTMENT ” section in
the CHAPTER 3.
6 Upper ring nut 1
7 Rubber washer 1
213

5 - 15
CHAS
EC563000
REMOVAL POINTS
EC563202
Ring nut
1. Remove:Lower ring nut 1
Use the steering nut wrench 2.
WARNING
Support the steering shaft so that it may
not fall down.
Steering nut wrench:
YU-33975/90890-01403
2
1
Bearing race
1. Remove:
Bearing race 1
Remove the bearing race using long rod
2 and the hammer.
2. Remove:
Bearing race 1
Use the floor chisel 2.
CAUTION:
Take care not to damage the steering shaft
thread.
ASSEMBLY AND INSTALLATION
1. Install: Front fork assembly
NOTE:
When installing an inner tube assembly in the
lower bracket, align the projection a on the
inner tube assembly with the indentation b in
the lower bracket.
b
a
b
a
STEERING AND FRONT SUSPENSION

5 - 17
CHASSWINGARM
EC570000
SWINGARM
Extent of removal:1 Swingarm removal
2 Rear shock absorber removal
Extent of removal Order Part name Q ’ty Remarks
SWINGARM REMOVAL
WARNING
Support the machine securely so
there is no danger of it falling over.
Preparation for removal Hold the machine by placing the
suitable stand under the engine.
Seat assembly Refer to “FRONT FENDER, SEAT
ASSEMBLY AND FUEL TANK ” section
in the CHAPTER 4.
Rear wheel Refer to “FRONT WHEEL AND REAR
WHEEL ” section.
Drive chain
1 Rear shock absorber 1
2 Drive chain guard 1
3 Drive chain support 1
4 Drive chain guide 1
1
2

6 - 7
–+ELEC
EC624000
COUPLERS AND LEADS CONNECTION
INSPECTION
1. Check:
Couplers and leads connection
Rust/dust/looseness/short-circuit →
Repair or replace.
STARTER MOTOR OPERATION
1. Connect the positive battery terminal 1
and starter motor lead 2 with a jumper
lead 3.
Not operate → Repair or replace the
starter motor.
WARNING
 A wire that is used as a jumper lead must
have at least the same capacity or more
as that of the a battery lead, otherwise the
jumper lead may burn.
 This check is likely to produce sparks,
therefore make sure nothing flammable is
in the vicinity.
ELECTRIC STARTING SYSTEM

6 - 18
–+ELEC
ÈThe thermo switch circuit is open.
É The thermo switch circuit is closed.
Test step Water temperature Continuity
1 Less than 16
± 3 °C
(60.8 ± 5.4 °F) YES
2 More than 16
± 3 °C
(60.8 ± 5.4 °F) NO
3 More than 11
± 3 °C
(51.8 ± 5.4 °F) NO
4 Less than 11
± 3 °C
(51.8 ± 5.4 °F) YES
Test steps 1 & 2: Heating phase
Test steps 3 & 4: Cooling phase
WARNING

Handle the thermo switch with special
care.
 Never subject the thermo switch to
strong shocks. If the thermo switch is
dropped, replace it.
 Check the thermo switch operation.
CARBURETOR HEATER INSPECTION
1. Inspect:
Carburetor heater resistance
Out of specification → Replace.
Tester (+) probe →
Carburetor heater terminal 1
Tester ( –) probe →
Carburetor heater body 2
Carburetor
heater resistance Tester selector
position
4.6 ~ 9.6 Ω at
20 °C (68 °F) Ω
× 1
CARBURETOR HEATING SYSTEM