2005 YAMAHA YZ125LC ad blue

2-11
SPECMAINTENANCE SPECIFICATIONS
EC212300
ELECTRICAL
Part to be tightened Thread size Q’tyT ightening torqueNm m•kg ft•lb
Stator M 6 ×1.0 3 7 0.7 5.1
Rotor M12 ×1.25 1 56 5.6 40
Ignition coil M 6 ×1.0 2 7 0.7 5.1
Item Standard Limit
Ignition system:
Ignition timing (B.T.D.C.) 0.48 mm (0.019 in)…
Advancer type Electrical…
CDI:
Magneto-model (stator)/Manufacturer 1C300/YAMAHA…
Source coil 1 resistance (color) 720~1,080 Ωat 20°C (68°F)…
(Green/White-Black/Red)
Source coil 2 resistance (color) 44~66 Ωat 20°C (68°F)…
(Black-Green/Blue)
Pickup coil resistance (color) 248~372 Ωat 20°C (68°F)…
(White/Blue-White/Red)
CDI unit-model/Manufacturer 1C3-00/YAMAHA…
Ignition coil:
Model/Manufacturer 1C3-00/YAMAHA…
Minimum spark gap 6 mm (0.24 in)…
Primary winding resistance 0.24~0.36 Ωat 20°C (68°F)…
Secondary winding resistance 5.7~8.5kΩat 20°C (68°F)…
Spark plug cap:
Resistance 4~6 kΩat 20°C (68°F)…
1C3-9-30-2A 25/5/04 7:13 PM Page 12

6-1
ELECELECTRICAL COMPONENTS AND WIRING DIAGRAM
EC600000
ELECTRICAL
EC610000
ELECTRICAL COMPONENTS AND WIRING DIAGRAM
EC611000
ELECTRICAL COMPONENTS
1“ENGINE STOP” button
2CDI unit
3Ignition coil
4CDI magneto
5Spark plug
EC612000
WIRING DIAGRAM
COLOR CODE
B...................Black
O ..................Orange
Y...................Yellow
B/R ...............Brack/Red
B/W ..............Black/White
G/L ..............Green/Blue
G/W ..............Green/White
W/L...............White/Blue
W/R ..............White/Red
1C3-9-30-6 14/5/04 5:47 PM Page 2

6-5
ELECIGNITION SYSTEM
EC627011
CDI MAGNETO INSPECTION
1. Inspect:
9Pick-up coil resistance
Out of specification Replace.
2. Inspect:
9Source coil 1 resistance
Out of specification Replace.
Tester (+) leadWhite/Red lead 1
Tester (–) lead
White/Blue lead 2
Pick–up coil Tester selector
resistance position
248~372Ωat
Ω× 100
20°C (68°F)
Tester (+) leadBlack/Red lead 1
Tester (–) lead
Green/Whitelead 2
Source coil 1 Tester selector
resistance position
720~1,080Ωat
Ω× 100
20°C (68°F)
EC62B000
SPARK PLUG CAP INSPECTION
1.Inspect:
9Spark plug cap
Loose connection Tighten.
Deteriorated/damaged Replace.
9Spark plug cap resistance
Out of specification Replace.
Tester (+) leadSpark plug lead terminal1
Tester (–) lead
Spark plug terminal2
Spark plug cap Tester selector
resistance position
4~6kΩat
kΩ× 1
20°C (68°F)
1C3-9-30-6 14/5/04 5:47 PM Page 12

6-6
ELECIGNITION SYSTEM
3. Inspect:
9Source coil 2 resistance
Out of specification Replace.
EC628000
CDI UNIT INSPECTION
Check all electrical components. If no fault is
found, replace the CDI unit. Then check the
electrical components again.
Tester (+) leadGreen/Blue lead 1
Tester (–) lead
Black lead 2
Source coil 2 Tester selector
resistance position
44~66Ωat
Ω× 10
20°C (68°F)
1C3-9-30-6 14/5/04 5:47 PM Page 14

7-21
TUNSETTING
EC72Q011
Rear shock absorber setting parts
9Rear shock spring 1
[Equal pitch spring ]
[Unequal pitch spring ]
NOTE:
9The unequal pitch spring is softer in initial char-
acteristic than the equal pitch spring and is diffi-
cult to bottom out under full compression.
9The I.D. color ais marked at the end of the
spring.
9Extent of adjustment (spring length)
SPRING SPRINGI.D.SPRING
TYPE
RATE PART NUMBERCOLORFREE
/POINTLENGTH
SOFT4.3 5UN-22212-00Brown/1260
4.5 5UN-22212-10Green/1260
STD 4.7 5UN-22212-20 Red/1 260
4.9 5UN-22212-30 Black/1 260
5.1 5UN-22212-40 Blue/1 260
STIFF 5.3 5UN-22212-50
Yellow/1260
5.5 5UN-22212-60 Pink/1 260
5.7 5UN-22212-70 White/1 260
SPRING
SPRINGI.D.SPRING
TYPE RATE
PART NUMBERCOLORFREE
(approx.)/POINTLENGTH
SOFT 4.5 5UN-22212-A0 Green/2 275
4.7 5UN-22212-B0 Red/2 275
4.9 5UN-22212-C0 Black/2 275
5.1 5UN-22212-D0 Blue/2 275
5.3 5UN-22212-E0
Yellow/2 275
5.5 5UN-22212-F0 Pink/2 275
STIFF 5.7 5UN-22212-G0
White/2 275
SPRING FREE EXTENT OF
LENGTH ADJUSTMENT b
260mm (10.24in)240.5~258.5mm(9.47~10.18in)
275mm (10.83in)255.5~273.5mm(10.06~10.77in)
1C3-9-30-7B 25/5/04 7:26 PM Page 20