Ignition System Specifications For Your 1997-2001 Yamaha YZ125
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Electrical System Specifications
| Ignition Timing (Piston Location) | |
| – 1994 – 1995: 14° @ 11,000 RPM | 1.02 mm (0.040 in.) BTDC |
| – 1996: 10° @ 700 RPM | 0.52 mm (0.020 in.) BTDC |
| – 1997 – 2001: 32° @ 3,000 RPM | 0.52 mm (0.020 in.) BTDC |
| Magneto (1994 – 1995) | |
| Model Number | Mitsubishi No. F4T80671 |
| Stator Coil Resistance | |
| – Source Coil No. 1 – Brown to Red | 324 – 396 Ohms |
| – Source Coil No. 2 -White to Green | 16 – 19 Ohms |
| – Pick Up Coil – White/Green to White/Red | 446 – 545 Ohms |
| Magneto (1996 – 2001) | |
| Model Number | Yamaha No. F4SS00 |
| Stator Coil Resistance | |
| – Source Coil No. 1 – Green/White to Black/Red | 720 – 1080 Ohms |
| – Source Coil No. 2 -Black to Green/Blue | 44 – 66 Ohms |
| – Pick Up Coil – White/Blue to White/Red | 248 – 372 Ohms |
| CDI Model Number | |
| – 1994 – 1995 | Mitsubishi No. F8T31382 |
| – 1996 – 1999 | Yamaha No. 4XM-00 |
| – 2000 | Yamaha No. 5HD-00 |
| – 2001 | Yamaha No. 5MV-00 |
| Ignition Coil (1994 – 1995) | |
| Model Number | Mitsubishi No. F6T540 |
| Primary Winding Resistance | 0.45 – 0.61 Ohms |
| Secondary Winding Resistance | 10,700 – 14,500 Ohms |
| Ignition Coil (1996 – 2001) | |
| Model Number | Yamaha No. 4SS-00 |
| Primary Winding Resistance | 0.14 – 0.61 Ohms |
| Secondary Winding Resistance | 6,700 – 10,100 Ohms |
Flywheel Torque Specifications
| ft.-lb | N•n | |
| Flywheel Nut | ||
| – 1994 – 2000 | 28 | 38 |
| – 2001 | 24 | 33 |
