2000 YAMAHA TTR125 check oil

3 - 17
INSP
ADJ
DRIVE CHAIN INSPECTION
EC369002
DRIVE CHAIN INSPECTION
1. Remove:
lMaster link clip
lJoint 1
lDrive chain 2
2. Clean:
lDrive chain
Place it in kerosene, and brush off as
much dirt as possible. Then remove the
chain from the kerosene and dry the
chain.
3. Measure:
lDrive chain length (10 links) a
Out of specification ® Replace.
Drive chain length (10 links):
: 121.4 mm (4.78 in)
4. Check:
lDrive chain stiffness a
Clean and oil the chain and hold as
illustrated.
Stiff ® Replace drive chain.
5. Install:
lDrive chain 1
lJoint 2
lMaster link clip 3
CAUTION:
Be sure to install the master link clip to the
direction as shown.
aTurning direction
New

3 - 18
INSP
ADJ
DRIVE CHAIN SLACK ADJUSTMENT
6. Lubricate:
lDrive chain
Drive chain lubricant:
SAE 10W-30 motor oil or suit-
able chain lubricants
DRIVE CHAIN SLACK ADJUSTMENT
1. Elevate the rear wheel by placing the
suitable stand under the engine.
2. Check:
lDrive chain slack a
In the center between the drive axle
and rear wheel axle.
Out of specification ® Adjust.
NOTE:
Before checking and/or adjusting, rotate the
rear wheel through several revolutions and
check the slack several times to find the tight-
est point. Check and/or adjust chain slack with
rear wheel in this “tight chain” position.
Drive chain slack:
35 ~ 60 mm (1.4 ~ 2.4 in)
3. Adjust:
lDrive chain slack
Drive chain slack adjustment steps:
lLoosen the axle nut 1.
lTurn both drive chain pullers 2 the same
amount a and adjust them to the stopper
in the same position so that the drive
chain slack is within the specified limits.
lTighten the axle nut while pushing down
the drive chain.
T R..
Axle nut:
60 Nm (6.0 m • kg, 43 ft • lb)
CAUTION:
Too small chain slack will overload the
engine and other vital parts; keep the
slack within the specified limits.

4 - 19
ENGCYLINDER HEAD
9. Check:
lValve clearance
Out of specification ® Adjust.
Refer to “VALVE CLEARANCE
INSPECTION AND ADJUSTMENT”
section in CHAPTER 3.
10. Apply:
lEngine oil
To camshaft.
11. Install:
lTappet cover 1
lCylinder head side cover 2
T R..18 Nm (1.8 m · kg, 13 ft · lb)
T R..10 Nm (1.0 m · kg, 7.2 ft · lb)
12. Install:
lTiming mark accessing screw 1
lCrankshaft end accessing screw 2
T R..7 Nm (0.7 m · kg, 5.1 ft · lb)
T R..7 Nm (0.7 m · kg, 5.1 ft · lb)
13. Install:
lSpark plug
lEngine bracket
T R..13 Nm (1.3 m · kg, 9.4 ft · lb)
T R..40 Nm (4.0 m · kg, 29 ft · lb)

4 - 47
ENGCLUTCH AND PRIMARY DRIVEN GEAR
5. Install:
lBall
NOTE:
Apply the engine oil on the ball.
6. Install:
lPush rod 1 1
lPush plate 2
lWasher 3
lNut (push rod 1) 4
7. Install:
lPressure plate 1
lClutch spring 2
lBolt (clutch spring) 3
NOTE:
lAlign the arrow mark a on the pressure
plate with the punched mark b on the clutch
boss.
lTighten the bolts in stage, using a crisscross
pattern.
T R..6 Nm (0.6 m · kg, 4.3 ft · lb)
8. Check:
lPush lever position
Push the push lever assembly in the
arrow direction and make sure that the
mach mark are aligned ® adjust.
aMatch mark on the push lever assembly
bMatch mark on the crankcase

4 - 78
ENGTRANSMISSION, SHIFT CAM AND SHIFT FORK
Shift cam and shift fork
1. Install:
lShift fork 1 (L) 1
lShift fork 2 (C) 2
lShift fork 3 (R) 3
NOTE:
lMesh the shift fork #1 (L) with the 2nd wheel
gear and #3 (R) with the 4th wheel gear on
the drive axle.
lMesh the shift fork #2 (C) with the 3rd pinion
gear on the main axle.
2. Install:
lShift cam 1
NOTE:
Apply the engine oil on the shift cam.
3. Install:
lShift fork guide bar 1 (short) 1
lShift fork guide bar 2 (long) 2
NOTE:
lApply the engine oil on the guide bars.
lBe sure the long bar is inserted into the shift
forks #1 and #3 and the short one into #2.
4. Check:
lShifter operation
lTransmission operation
Unsmooth operation ® Repair.

5 - 12
CHAS
4. Inspect:
lBrake drum inner surface.
Oil/scratches ® Remove.
OilUse a rag soaked in lac-
quer thinner or a solvent.
ScratchesUse a emery cloth (lightly
and evenly polishing).
ASSEMBLY AND INSTALLATION
Brake shoe plate assembly
1. Install:
lBrake camshaft 1
NOTE:
Apply the lithium soap base grease on the
brake camshaft.
2. Check:
lBrake camshaft operation
Unsmooth operation ® Repair.
3. Install:
lWear indicator plate 1
NOTE:
When installing the wear indicator plate to the
brake camshaft align the projection a on the
wear indicator plate with the slots b on the
brake camshaft.
4. Install:
lBrake camshaft lever 1
NOTE:
Install the brake camshaft lever so that the
angle b between a line drawn through the hub
of the brake shoe and dot a, and a line drawn
through the midline of the camshaft and dot a
is 46.5˚.
T R..10 Nm (1.0 m · kg, 7.2 ft · lb)
REAR WHEEL AND REAR BRAKE

5 - 22
CHASFRONT FORK
5. Install:
lOil seal 1
NOTE:
lApply the fork oil on the inner tube.
lWhen installing the oil seal, use vinyl seat a
with fork oil applied to protect the oil seal lip.
lInstall the oil seal with its manufacturer's
marks or number facing upside.
lPress the oil seal into the outer tube with fork
seal driver attachment (ø30) 2 and fork seal
driver weight 3.
Fork seal driver weight:
YM-33963/90890-01367
Fork seal driver attachment (ø30):
YM-33281/90890-01400
New
6. Install:
lStopper ring 1
NOTE:
Fit the stopper ring correctly in the groove in
the outer tube.
7. Install:
lDust seal 1
NOTE:
Apply the lithium soap base grease on the
inner tube.
8. Check:
lInner tube smooth movement
Tightness/binding/rough spots ®
Repeat the steps 2 to 7.

6 - 2
–+ELEC

IGNITION SYSTEM
EC620000
IGNITION SYSTEM
INSPECTION STEPS
Use the following steps for checking the possibility of the malfunctioning engine being attributable to
ignition system failure and for checking the spark plug which will not spark.
*marked: Only when the ignition checker is used.
NOTE:

l
Remove the following parts before inspection.
1) Seat
2) Fuel tank
l
Use the following special tools in this inspection.
Spark gap test*Clean or replace
spark plug.
Check entire ignition
system for connection.Repair or replace.
Check engine stop switch. Replace.
Check ignition coil. Primary coil Replace.
Secondary coilReplace.
Check CDI magneto. Pickup coil Replace.
Charging coil Replace.
Replace CDI unit.
Dynamic spark tester:
YM-34487
Ignition checker:
90890-06754
Pocket tester:
YU-03112/90890-03112
No Spark
OK
OK
OK
OK
Spark
No good
No good
No good
No good
No good
No good