How To Service & Replace The Ignition System On Your 1994-2001 Yamaha YZ125
Electrical Replace can get very frustrating, and it's very easy to lose track of what you've done and still need to do, so write down everything you need to test, then as you go, write down the test results.
You want to start with the simplest solution; there's no sense replacing the stator on your ’94-’01 Yamaha YZ125 when all you had was a ground fault. So start with the spark plug, then work your way back to the stator.
You can only test the CDI through the process of elimination, so if everything else is tested within spec, the CDI will need to be replaced.
For whatever reason, Yamaha does not provide peak voltage specs for anything, so If you want to do a physical test of your ignition coil, you will need to take it to a shop and have it tested.
My 94 - 01 Yamaha YZ 125 has spark, but it's very weak. My bike will start idle and rev just fine, but as soon as it's under load, it chokes out. When I pull the plug, its wet, not damp, but wet with oil. I know it's not a carb issue, but I'll get into that in the carb video.
After working through this troubleshooting procedure, I found that the resistance of the primary winding of my ignition coil was metering way out of spec.
You will need a multimeter if you get to the ignition coil and stator. You Can Get All The Dirt Bike Parts And Tools You Need Through Our Partner Links! → http://bit.ly/fydbparts
