Hi,i have a sunl slu-6k,its not getting any fire.I have changed the coil,stator,cdi,key switch,voltage regulator and the wiring harness.Can you give me some help with this because im lost. thanks steve

Stator will stop the cdi from firing the spark plug and either cdi or stator if bad will stop a spark from being created. The coil, wiring, kill switch and other things can also stop ignition spark.

Do you have a teather switch ? I would suggest start by checking the resistance of the on off switch . Then procede to the cdi relay. If you do not know how to test such items let me know and I will break it down step by step.

did you check the timing, piston, or put your thumb over the spark plug hole to feel for compression?

Heres how it works.

There is a 1.stator and 2.rotor and 3.signal generator, located on the cranckshaft.
1.Stator produces A/C current
2. Rotor has magnets in it and goes around the stator and is part of the A/C current process.
Rotor also has a raised spot on the out side of it which the signal generator identifies.
3.Signal generator is a wire positioned just above the rotor to read the raised spot on
the rotor every time the rotor spins around. This wire tells the cdi to fire.

The CDI which receives the signal from the signal generator wire. Sends the signal to a coil.

The coil is energized and fires.

Always check the components in reverse order, because the stator, rotor and signal generator rarely fail.

1st, if your getting power to the coil and the coil doesn't fire , then its the coil .
2nd if your not getting power to the coil, then its probably the cdi.
3rd. Check that all the wires are making a good contact before you change your cdi, because
cdi is usually exspensive.
4th before you purchase the cdi, make sure the stator and rotor and signal generator are working.

This will get you started.
best regards
Big Al

if you have replaced all that it sounds like it is the stator. its an alternator for small engines. get one on ebay cause factory are always expensive. its located behind the pull start. take that off then the side case cover.

Try following the wire from the stop button on the handle bar back to the CDI box. Simply unplug that wire. CDI is disabled by grounding. Does the KDX have a key switch or just the stop button. Try just connecting the pick up wire to the CDI and CDI to coil. You have to isolate ground to CDI to run. Check air gap at pick up. Use a matchbook for a gauge.(.018)

Sounds like the CDI was bad to begin with not the stator. The stator puts out unregulated power. The CDI regulates the voltage output as well as sends power to the coils. Hope this helps...

well the stator doesn't give spark it give voltage and if you test it and the is voltage and you have replaced all that stuff with good ones then it is your cdi box.

to test the stator for voltage take a multimeter on the ac scale and test the output of the stator while kicking the bike over if you have voltage rising and falling then your stator is fine. if not you will need to test the pick coil in the stator area for a ground pulse this is what the cdi box uses as a reference for the position of crank shaft and piston. just like a crank sensor in a car. if there is ground pulse there when you back probe the wires coming out of the pick up then your cdi is for sure the issue. if you have any more question please ask. good luck

I have a 83 DR 250 and i'm not getting enough voltage to create a spark, all I can suggest is that you check your battery and make sure its at full flavour. Check and see if you are getting any voltage prior to the ignition coil (should be 18-35v). If you suspect battery then try clutching it as the alternator moving faster might give you enough to get her going. Also check all your connections and earths. Earth wires are often overlooked and can cause you just as many problems as the actives. So give that a go and get back to me mate. Cheers

The Sunl's are notorious for the stator going out. Check with your dealer for specs on testing the stator. It could also be the CDI unit too! I hope this helps