I need help from guys with YZ experience or at least CDI ignition knowledge. Bikes now all but done upon starting it won't rev past maybe midrange, just blubbers/ breaks-up sounding "sorta" like it s rich... but it's not. Absolutely not a carburation issue... though I did replace parts in there, floats, fuel inlet needle and seat, 370 main jet.( other stuff in there is stock sizes and look good.)
I bought bike knowing P/O claimed ignition problem... he's right.
Things ruled out:
-Kill button is off ,not an issue.
- I've tried 3 different high tension coils and it runs same. Plus, the original coil tests ok anyway.(Pri. winding= .6 ohm. Sec. winding =5.8K ohm. Plug cap and wire insulation looks good.
-I bought a USED Ebay CDI box. Came from a running 80 or 81 250.... so the seller claimed. No tests specs for CDI box I know of. .... IS THAT CORRECT ?
- both coils on stator plate check out resistance , one is .6 ohms, other is 1450 ohms. Well within specs. They also LOOK like new.
- Rotor feels to have strong magnetivity....any ferrus metal sticks like hell to it.
So, is running symptom indicative to still having a bad CDI box? I HATE to buy another ebay used one but whats a guy to do ! !
help ! ! And thanks. dave