Hi fellas – I have a Chinese 110 cc quad that I’ve been trying to get going. Trouble is, I have no spark. I bought a completely new wiring harness and all new electrical components. I’m checking for spark with the spark plug pulled out, grounding it against the chassis while I crank it. Usually, it doesn’t spark at all. Rarely, it has spark, usually just maybe one spark at the beginning or end of a cranking. Even though I have new all new electrical components (new cdi, stator, ignition switch, wiring harness, rectifier, spark plug,) I have tried a swapping out different CDI, different spark plug, different coil, and two different stators. None of this has helped. Checking resistances on all 3 windings of the stator checks out. One thing that doesn’t check out though is that the stator voltage is low. Initially, it was 29 V AC while cranking with a new battery. I’m reading it should be more like 40. I tried another stator and now I have 24 V while cranking. I am measuring this at the red/black wire coming off the stator. The flywheel is fairly clean. it looks like the gap between the stator and flywheel is not adjustable. any suggestions would be much appreciated. Thanks in advance for any help!
-Jason

 

24v from power coil should be enough. DC versions use 12v battery power to do the same job. Are you getting a voltage on trigger coil wires? Some on here recon that the trigger coils on these universal harness stators is too far from the flywheel, and stretch the mounting holes to alter it. I try to avoid fitting "new everything" as you can end up with new faulty components.

 

Merryman – thank you for getting back to me. that is tremendously helpful to know that 24 V should be enough. I know these numbers
can vary from machine to machine and component to component. But I wasn’t sure if that was acceptable or not. To answer your question, I do get .9 V on the trigger wire while cranking.

Sometimes, I think it’s difficult to proceed with troubleshooting if you find a potential problem and you’re not really sure if it’s a problem or not. So knowing that 24 V should be adequate, I will carry on further with troubleshooting and probably be back with more questions! thanks again!
-Jay