2004 YAMAHA TTR125 transmission oil

CHAPTER 3
REGULAR INSPECTION
AND ADJUSTMENTS
MAINTENANCE INTERVALS ...................3-1
PRE-OPERATION INSPECTION
AND MAINTENANCE ................................3-3
ENGINE ......................................................3-4
CHASSIS .................................................3-15
ELECTRICAL ...........................................3-34
CHAPTER 4
ENGINE
SEAT, FUEL TANK
AND SIDE COVERS ..................................4-1
MUFFLER ..................................................4-2
CARBURETOR ..........................................4-3
CYLINDER HEAD ....................................4-12
CAMSHAFT AND ROCKER ARMS ........4-20
VALVES AND VALVE SPRINGS ............4-24
CYLINDER AND PISTON ........................4-32
CLUTCH AND PRIMARY DRIVEN
GEAR .......................................................4-40
OIL PUMP ................................................4-49
KICK AXLE AND SHIFT SHAFT .............4-53
CDI MAGNETO
(TT-R125/TT-R125LW) ............................4-58
CDI MAGNETO AND STARTER
CLUTCH (TT-R125E/TT-R125LWE) .......4-61
ENGINE REMOVAL .................................4-66
CRANKCASE, CRANKSHAFT
AND BALANCER ....................................4-70
TRANSMISSION, SHIFT CAM
AND SHIFT FORK ...................................4-78

SPEC
2 - 3
GENERAL SPECIFICATIONS
Transmission:
Primary reduction system Gear
Primary reduction ratio 68/19 (3.579)
Secondary reduction system Chain drive
Secondary reduction ratio 49/13 (3.769)
Transmission type Constant mesh, 5-speed
Operation Left foot operation
Gear ratio: 1st 37/14 (2.643)
2nd 32/18 (1.778)
3rd 25/19 (1.316)
4th 23/22 (1.045)
5th 21/24 (0.875)
Chassis:
Frame type Diamond
Caster angle 28.7˚
Trail 93 mm (3.66 in)
Tire:
Type With tube
Size (front) 70/100-17 40M
Size (rear) 90/100-14 49M
Manufacturer (front and rear) CHENG SHIN
Tire pressure (front and rear) 100 kPa (1.00 kgf/cm
2, 15 psi)
Brake:
Front brake type Drum brake
Operation Right hand operation
Rear brake type Drum brake
Operation Right foot operation
Suspension:
Front suspension Telescopic fork
Rear suspension Swingarm (link type monocross suspension)
Shock absorber:
Front shock absorber Coil spring/oil damper
Rear shock absorber Coil spring/gas, oil damper
Wheel travel:
Front wheel travel 180 mm (7.09 in)
Rear wheel travel 160 mm (6.30 in)
Electrical:
Ignition system CDI
Generator system (TT-R125E) CDI magneto
Battery type (TT-R125E) GT4L-BS
Battery voltage/capacity (TT-R125E) 12 V/3.2 AH
Specific gravity (TT-R125E) 1.320

SPEC
2 - 6
GENERAL SPECIFICATIONS
Transmission:
Primary reduction system Gear
Primary reduction ratio 68/19 (3.579)
Secondary reduction system Chain drive
Secondary reduction ratio 54/13 (4.154)
Transmission type Constant mesh, 5-speed
Operation Left foot operation
Gear ratio: 1st 37/14 (2.643)
2nd 32/18 (1.778)
3rd 25/19 (1.316)
4th 23/22 (1.045)
5th 21/24 (0.875)
Chassis:
Frame type Diamond
Caster angle 28.5˚
Trail 107 mm (4.21 in)
Tire:
Type With tube
Size (front) 70/100-19 42M
Size (rear) 90/100-16 52M
Manufacturer (front and rear) INOUE RUBBER
Tire pressure (front and rear) 100 kPa (1.00 kgf/cm
2, 15 psi)
Brake:
Front brake type Single disc brake
Operation Right hand operation
Rear brake type Drum brake
Operation Right foot operation
Suspension:
Front suspension Telescopic fork
Rear suspension Swingarm (link type monocross suspension)
Shock absorber:
Front shock absorber Coil spring/oil damper
Rear shock absorber Coil spring/gas, oil damper
Wheel travel:
Front wheel travel 180 mm (7.09 in)
Rear wheel travel 168 mm (6.61 in)
Electrical:
Ignition system CDI
Generator system (TT-R125LWE) CDI magneto
Battery type (TT-R125LWE) GT4L-BS
Battery voltage/capacity (TT-R125LWE) 12 V/3.2 AH
Specific gravity (TT-R125LWE) 1.320

SPEC
2 - 7
CARACTÉRISTIQUES D’ENTRETIEN
MOTEUR
Désignation Standard Limite
Culasse:
Limite de déformation ---- 0,03 mm
(0,0012 in)
Cylindre:
Alésage 54,000 à 54,019 mm
(2,1260 à 2,1267 in)----
Limite d’ovalisation ---- 0,05 mm
(0,0020 in)
Arbre à cames:
Méthode d’entraînement Transmission par chaîne (côté gau-
che)----
Dimensions de came
Admission“A” 25,881 à 25,981 mm
(1,0189 à 1,0229 in)25,851 mm
(1,0178 in)
“B” 21,195 à 21,295 mm
(0,8344 à 0,8384 in)21,165 mm
(0,8333 in)
Échappement“A” 25,841 à 25,941 mm
(1,0174 à 1,0213 in)25,811 mm
(1,0162 in)
“B” 21,050 à 21,150 mm
(0,8287 à 0,8327 in)21,020 mm
(0,8276 in)
Limite de voile d’arbre à cames ---- 0,03 mm
(0,0012 in)
CARACTÉRISTIQUES D’ENTRETIEN

SPEC
2 - 15 PARTIE CYCLE
TT-R125/TT-R125E
Désignation Standard Limite
Système de direction:
Type de roulement de direction (haut) Roulement à contact oblique ----
(bas) Roulement à rouleaux coniques ----
Suspension avant:
Débattement de fourche avant 180 mm (7,09 in) ----
Longueur libre de ressort de fourche 327 mm (12,87 in) 322 mm (12,68 in)
Constante standard de ressort K = 3,00 N/mm
(0,310 kg/mm, 17,4 lb/in)----
Ressort/entretoise en option Non ----
Capacité d’huile 159 cm
3
(5,60 Imp oz, 5,38 US oz)----
Niveau d’huile 122 mm (4,80 in) ----
Grade d’huile Huile de fourche 10W ou huile équiva-
lente----
Diamètre extérieur du tube plongeur 30 mm (1,18 in) ----
Sommet de fourche avant Zéro mm (zéro in) ----
Suspension arrière:
Débattement d’amortisseur 65 mm (2,56 in) ----
Longueur libre de ressort (TT-R125) 175 mm (6,89 in) ----
(TT-R125E) 178 mm (7,01 in) ----
Longueur monté165 mm (6,50 in) ----
Constante standard de ressort
(TT-R125) K = 48,1 N/mm
(4,9 kg/mm, 274 lb/in)----
(TT-R125E) K = 50,5 N/mm
(5,1 kg/mm, 286 lb/in)----
Ressort optionnel Non ----
Pression du gaz 1.500 kPa
(15 kg/cm
2, 213 psi)----
Roue:
Type de roue avant Roue à rayons ----
Type de roue arrière Roue à rayons ----
Taille/matériau de jante avant 17 × 1,40/acier ----
Taille/matériau de jante arrière 14 × 1,60/acier ----
Limite de voile de jante:
Radial ---- 2,0 mm (0,08 in)
Latéral ---- 2,0 mm (0,08 in)
Chaîne de transmission:
Type/fabricant DID428 HD/DAIDO ----
Nombre de maillons 116 maillons ----
Flèche de la chaîne 35 à 50 mm (1,4 à 2,0 in) ----
Longueur de chaîne (10 maillons) ----121,4 mm
(4,78 in)
CARACTÉRISTIQUES D’ENTRETIEN

4 - 81
ENGTRANSMISSION, SHIFT CAM AND SHIFT FORK
Transmission
1. Install:
4th pinion gear (22T) 1
3rd pinion gear (19T) 2
2nd pinion gear (18T) 3
5th pinion gear (24T) 4
On main axle 5.
NOTE:
Apply the molybdenum disulfide oil on the
gears’ inner circumference.
Install the 5th pinion gear so that measure-
ment a is 83.25 ~ 83.45 mm (3.278 ~
3.285 in).
2. Install:
2nd wheel gear (32T) 1
5th wheel gear (21T) 2
3rd wheel gear (25T) 3
4th wheel gear (23T) 4
1st wheel gear (37T) 5
On drive axle 6.
NOTE:
Apply the molybdenum disulfide oil on the
gears’ inner circumference.

4 - 82
ENGTRANSMISSION, SHIFT CAM AND SHIFT FORK
3. Install:
Plain washer 1
Circlip 2
NOTE:
Be sure the circlip sharp-edged corner a is
positioned opposite side to the plain washer
and gear b.
Be sure the circlip end c is positioned at
axle spline groove d.
New
4. Install:
Push rod 2
On main axle.
NOTE:
Apply the engine oil on the push rod 2.
5. Install:
Washer 1
On drive axle.
6. Install:
Main axle
Drive axle
Install these in the left crankcase at the
same time.
NOTE:
Apply the lithium soap base grease on the oil
seal lip.
When installing the drive axle into the crank-
case, pay careful attention to the crankcase
oil seal lip.

4 - 83
ENGTRANSMISSION, SHIFT CAM AND SHIFT FORK
Shift cam and shift fork
1. Install:
Shift fork 1 (L) 1
Shift fork 2 (C) 2
Shift fork 3 (R) 3
NOTE:
Mesh the shift fork #1 (L) with the 2nd wheel
gear and #3 (R) with the 4th wheel gear on
the drive axle.
Mesh the shift fork #2 (C) with the 3rd pinion
gear on the main axle.
2. Install:
Shift cam 1
NOTE:
Apply the engine oil on the shift cam.
3. Install:
Shift fork guide bar 1 (short) 1
Shift fork guide bar 2 (long) 2
NOTE:
Apply the engine oil on the guide bars.
Be sure the long bar is inserted into the shift
forks #1 and #3 and the short one into #2.
4. Check:
Shifter operation
Transmission operation
Unsmooth operation → Repair.