2002 YAMAHA TTR125 width

SPEC

2 - 1
GENERAL SPECIFICATIONS
EC200000
SPECIFICATIONS
EC211000
GENERAL SPECIFICATIONS
TT-R125
Model name: TT-R125P
(USA-except for California, CDN, AUS, NZ)
TT-R125PC (USA for California)
TT-R125 (EUROPE)
Model code number: 5HPB (USA, AUS, NZ, EUROPE)
5HPC (CDN)
Dimensions: USA, AUS, NZ,
EUROPECDN
Overall length 1,830 mm (72.0 in) 1,865 mm (73.4 in)
Overall width 785 mm (30.9 in)
¬
Overall height 1,055 mm (41.5 in)
¬
Seat height 775 mm (30.5 in)
¬
Wheelbase 1,250 mm (49.2 in)
¬
Minimum ground clearance 265 mm (10.4 in)
¬
Basic weight:
With oil and full fuel tank 83 kg (183 lb)
Engine:
Engine type Air cooled 4-stroke, SOHC
Cylinder arrangement Single cylinder, forward inclined
Displacement 124 cm
3

(7.57 cu.in)
Bore
´
stroke 54.0
´
54.0 mm (2.126
´
2.126 in)
Compression ratio 10.0:1
Starting system Kickstarter
Lubrication system: Wet sump
Oil type or grade:
Engine oil (For USA and CDN)
At –10 ˚C (10 ˚F) or higher

Yamalube 4 (10W-30) or SAE 10W-30 type
SE motor oil
At 5 ˚C (40 ˚F) or higher
õ

Yamalube 4 (20W-40) or SAE 20W-40 type
SE motor oil
(Except for USA and CDN)
API “SE” or higher grade
2

SPEC

2 - 4
GENERAL SPECIFICATIONS
TT-R125LW
Model name: TT-R125LWP
(USA-except for California, CDN, AUS, NZ)
TT-R125LWPC (USA for California)
TT-R125LW (EUROPE)
Model code number: 5HPD (USA, AUS, NZ, EUROPE)
5HPE (CDN)
Dimensions: USA, AUS, NZ,
EUROPECDN
Overall length 1,885 mm (74.2 in) 1,890 mm (74.4 in)
Overall width 795 mm (31.3 in)
¬
Overall height 1,085 mm (42.7 in)
¬
Seat height 805 mm (31.7 in)
¬
Wheelbase 1,270 mm (50.0 in)
¬
Minimum ground clearance 295 mm (11.6 in)
¬
Basic weight:
With oil and full fuel tank 84 kg (185 lb)
Engine:
Engine type Air cooled 4-stroke, SOHC
Cylinder arrangement Single cylinder, forward inclined
Displacement 124 cm
3

(7.57 cu.in)
Bore
´
stroke 54.0
´
54.0 mm (2.126
´
2.126 in)
Compression ratio 10.0:1
Starting system Kickstarter
Lubrication system: Wet sump
Oil type or grade:
Engine oil (For USA and CDN)
At –10 ˚C (10 ˚F) or higher

Yamalube 4 (10W-30) or SAE 10W-30 type
SE motor oil
At 5 ˚C (40 ˚F) or higher
õ

Yamalube 4 (20W-40) or SAE 20W-40 type
SE motor oil
(Except for USA and CDN)
API “SE” or higher grade

SPEC

2 - 8
MAINTENANCE SPECIFICATIONS
Cam chain:
Cam chain type/No. of links DID25SD DHA/88 ----
Cam chain adjustment method Automatic ----
Rocker arm/rocker arm shaft:
Shaft outside diameter 9.981 ~ 9.991 mm
(0.3930 ~ 0.3933 in)9.95 mm
(0.3917 in)
Rocker arm inside diameter 10.000 ~ 10.015 mm
(0.3937 ~ 0.3943 in)10.03 mm
(0.3949 in)
Valve, valve seat, valve guide:
Valve clearance (cold) IN 0.08 ~ 0.12 mm
(0.0031 ~ 0.0047 in)----
EX 0.10 ~ 0.14 mm
(0.0039 ~ 0.0055 in)----
Valve dimensions:
“A” head diameter IN 25.9 ~ 26.1 mm
(1.0197 ~ 1.0276 in)----
EX 21.9 ~ 22.1 mm
(0.8622 ~ 0.8701 in)----
“B” face width IN 1.1 ~ 3.0 mm
(0.0433 ~ 0.1181 in)----
EX 1.7 ~ 2.8 mm
(0.0669 ~ 0.1102 in)----
“C” seat width IN0.9 ~ 1.1 mm
(0.0354 ~ 0.0433 in)1.6 mm
(0.0630 in)
EX 0.9 ~ 1.1 mm
(0.0354 ~ 0.0433 in)1.6 mm
(0.0630 in)
“D” margin thickness IN 0.4 ~ 0.8 mm
(0.0157 ~ 0.0315 in)----
EX 0.8 ~ 1.2 mm
(0.0315 ~ 0.0472 in)----
Stem outside diameter IN4.975 ~ 4.990 mm
(0.1959 ~ 0.1965 in)4.950 mm
(0.1949 in)
EX 4.960 ~ 4.975 mm
(0.1953 ~ 0.1959 in)4.935 mm
(0.1943 in)
Guide inside diameter IN 5.000 ~ 5.012 mm
(0.1969 ~ 0.1973 in)5.042 mm
(0.1985 in)
EX 5.000 ~ 5.012 mm
(0.1969 ~ 0.1973 in)5.042 mm
(0.1985 in)
Stem-to-guide clearance IN0.010 ~ 0.037 mm
(0.0004 ~ 0.0015 in)0.08 mm
(0.0031 in)
EX 0.025 ~ 0.052 mm
(0.0010 ~ 0.0020 in)0.10 mm
(0.0040 in) Item Standard Limit
Head diameter
B
Face widthC
Seat width
D
Margin thicknessA

SPEC

2 - 9
MAINTENANCE SPECIFICATIONS
Stem runout limit----0.01 mm
(0.0004 in)
Valve seat width IN0.9 ~ 1.1 mm
(0.0354 ~ 0.0433 in)1.6 mm
(0.0630 in)
EX 0.9 ~ 1.1 mm
(0.0354 ~ 0.0433 in)1.6 mm
(0.0630 in)
Valve spring:
Free length IN 32.55 mm (1.28 in) 31.2 mm
(1.23 in)
EX 32.55 mm (1.28 in) 31.2 mm
(1.23 in)
Set length (valve closed) IN 25.6 mm (1.01 in) ----
EX 25.6 mm (1.01 in) ----
Compressed pressure
(installed) IN 137.5 ~ 158.1 N
(14.0 ~ 16.1 kg, 30.86 ~ 35.49 lb)----
EX 137.5 ~ 158.1 N
(14.0 ~ 16.1 kg, 30.86 ~ 35.49 lb)----
Tilt limit * IN ----2.5˚/1.4 mm
(2.5˚/0.06 in)
EX ----2.5˚/1.4 mm
(2.5˚/0.06 in)
Direction of winding
(top view) IN Clockwise ----
EX Clockwise ---- Item Standard Limit

SPEC

2 - 11
MAINTENANCE SPECIFICATIONS
Crankshaft:
Crank width “A” 46.95 ~ 47.00 mm
(1.848 ~ 1.850 in)----
Runout limit “C” ---- 0.03 mm
(0.0012 in)
Big end side clearance “D” 0.15 ~ 0.45 mm
(0.0059 ~ 0.0177 in)0.5 mm
(0.02 in)
Clutch:
Friction plate thickness 2.92 ~ 3.08 mm
(0.115 ~ 0.121 in)2.8 mm
(0.110 in)
Quantity 5 ----
Clutch plate thickness 1.05 ~ 1.35 mm
(0.041 ~ 0.053 in)----
Quantity 4 ----
Warp limit ---- 0.2 mm
(0.008 in)
Clutch spring free length 33 mm (1.30 in) 31 mm
(1.22 in)
Quantity 4 ----
Clutch release method Inner push, cam push ----
Push rod bending limit ---- 0.5 mm
(0.020 in)
Shifter:
Shifter type Cam drum and guide bar ----
Kick starter:
Type Kick and mesh type ----
Kick clip friction force 6.4 ~ 13.2 N
(0.65 ~ 1.35 kg, 1.4 ~ 3.0 lb)----
Carburetor:
I.D. mark 5HP1 10 ----
Main jet (M.J) #105 ----
Main jet nozzle (N.J) N-6M ----
Main air jet (M.A.J) ø1.2 ----
Jet needle-clip position (J.N) 5HGM56-2 ----
Cutaway (C.A) 2.5 ----
Pilot air jet 1 (P.A.J.1) #80 ----
Pilot air jet 2 (P.A.J.2) #145 ----
Pilot outlet (P.O) ø1.05 ----
Pilot jet (P.J) #15 ----
Pilot air screw (example) (A.S) (2-1/2 ~ 3-1/2 turns out) ----
Bypass (B.P)ø1.0----
Needle valve seat size (V.S) 1.8 ----
Starter jet 1 (G.S.1) #22.5 ----
Starter jet 2 (G.S.2) #1.2 ----
Fuel level (F.L) 6.0 ~ 7.0 mm (0.24 ~ 0.28 in) ----
Engine idle speed 1,300 ~ 1,500 r/min ----Item Standard Limit

4 - 25
ENGVALVES AND VALVE SPRINGS
REMOVAL POINTS
Valve
1. Check:
lValve sealing
Leakage at the valve seat ® Inspect
the valve face, valve seat and valve
seat width.
Checking steps:
lPour a clean solvent 1 into the intake and
exhaust ports.
lCheck that the valve seals properly.
There should be no leakage at the valve
seat 2.
2. Remove:
lValve cotters 1
NOTE:
Attach a valve spring compressor 2 between
the valve spring retainer and the cylinder head
to remove the valve cotters.
Valve spring compressor:
YM-4019/90890-04019
3. Remove:
lValve spring retainer 1
lValve spring 2
lValve 3
lValve stem seal 4
lValve spring seat 5
NOTE:
Identify the position of each part very carefully
so that it can be reinstalled in its original place.

4 - 28
ENGVALVES AND VALVE SPRINGS
8. Measure:
lValve seat width a
Out of specification ® Reface the valve
seat.
Valve seat width:
Intake:
0.9 ~ 1.1 mm (0.0354 ~ 0.0433 in)
: 1.6 mm (0.0630 in)
Exhaust:
0.9 ~ 1.1 mm (0.0354 ~ 0.0433 in)
: 1.6 mm (0.0630 in)
Measurement steps:
lApply Mechanic’s blueing dye (Dykem) b
to the valve face.
lInstall the valve into the cylinder head.
lPress the valve through the valve guide
and onto the valve seat to make a clear
pattern.
lMeasure the valve seat width. Where the
valve seat and valve face made contact,
blueing will have been removed.
lIf the valve seat is too wide, too narrow, or
the seat is not centered, the valve seat
must be refaced.
9. Lap:
lValve face
lValve seat
NOTE:
After refacing the valve seat or replacing the
valve and valve guide, the valve seat and
valve face should be lapped.
Lapping steps:
lApply a coarse lapping compound to the
valve face.
CAUTION:
Do not let the compound enter the gap
between the valve stem and the valve
guide.
lApply molybdenum disulfide oil to the
valve stem.

4 - 29
ENGVALVES AND VALVE SPRINGS
lInstall the valve into the cylinder head.
lTurn the valve until the valve face and
valve seat are evenly polished, then clean
off all of the compound.
NOTE:
For best lapping results, lightly tap the valve
seat while rotating the valve back and forth
between your hands.
lApply a fine lapping compound to the
valve face and repeat the above steps.
NOTE:
After every lapping operation be sure to
clean off all of the compound from the valve
face and valve seat.
lApply Mechanic’s blueing dye (Dykem) to
the valve face.
lInstall the valve into the cylinder head.
lPress the valve through the valve guide
and onto the valve seat to make a clear
pattern.
lMeasure the valve seat width again. If the
valve seat width is out of specification,
reface and re-lap the valve seat.
Valve spring
1. Measure:
lValve spring free length a
Out of specification ® Replace.
Free length (valve spring):
Intake:
32.55 mm (1.28 in)
: 31.2 mm (1.23 in)
Exhaust:
32.55 mm (1.28 in)
: 31.2 mm (1.23 in)