Help help
Ok guys need your help bought a Chinese 150cc atv/gocart
No spark checked all the wiring traced back to this.
When I crank the motor I get 50v a/c at the coil red /black wire can't get any a/c voltage from the pick up blue and white wire.but on resistance I can see it fluctuating when cranking. Any way when I plug into a 5 pin cdi my 50v a/c becomes 25.1 v a/c I'm bafffeled to this so I bought a new coil pack and flywheel put them on getting the same readings still no spark please help kids keep asking if it's fixed yet tried another Cdi still the same. It's like the motor is not turning fast enough to generate power good battery

Thanks

 

Those wiring colours don't mean much without the diagram, but if you are not getting any AC voltage from the pick up coil, the cdi won't know when to spark.