YZ250 YAMAHA SERVICE SPECIFICATIONS

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ELECTRICAL

FITS 85-86 YZ250 - 56A-85510-K1-00
SOURCE COIL
RED TO BROWN 150 +\- 10%

PICK UP COIL
WHITE/GREEN TO WHITE 100 +\- 10%

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IGNITION SYSTEM
Ignition System:
Ignition timing (B.T.D.C.): 0.18mm (.007 in)
Advancer type: Electrical

CDI:
Magneto-(stator) 5CU-02
Source coil 1 resistance Black - Black/Red 720-1080 Ohm at 20 deg C or 68 deg F
Source Coil 2 resistance Green/Blue - Green/White 44-66 ohm at 20 deg C or 68 deg F
Pick up Coil resistance White/Blue - White/Red 248-372 ohm at 20 deg C or 68 deg F

Ignition Coil: 4MX-00
Minimum Spark Gap 6mm or .24"
Primary winding resistance .20-.30 ohm at 20 deg C or 68 deg F
Secondary winding resistance 9.5-14.3 K ohm at 20 deg C or 68 deg F

Spark Plug cap 4-6 K ohm at 20 deg C or 68 deg F

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STATOR 4SR 00 FITS 96-98 YZ250 – 4SR-85560-00-00
SOURCE COIL 1 - GREEN/WHITE TO BLACK/RED 720-1080 OHMS
SOURCE COIL 2 - BLACK TO GREEN/BLUE 44-66 OHMS
PICK UP COIL - WHITE/BLUE TO WHITE/RED 248-372 OHMS

COIL FITS 96-98 YZ250, 01-02 YZ250F WR250F - 4SR-82310-00-00
PRIMARY WINDING RESISTANCE .20-.30 OHMS
SECONDARY WINDING RESISTANCE 9500-14,300 OHMS

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6-18-13 added:
CDI:
Magneto-(stator) 5CU-02
Source coil 1 resistance Black - Black/Red 720-1080 Ohm at 20 deg C or 68 deg F
Source Coil 2 resistance Green/Blue - Green/White 44-66 ohm at 20 deg C or 68 deg F
Pick up Coil resistance White/Blue - White/Red 248-372 ohm at 20 deg C or 68 deg F

Ignition Coil: 4MX-00
Minimum Spark Gap 6mm or .24"
Primary winding resistance .20-.30 ohm at 20 deg C or 68 deg F
Secondary winding resistance 9.5-14.3 K ohm at 20 deg C or 68 deg F

Spark Plug cap 4-6 K ohm at 20 deg C or 68 deg F