I recently acquired a feiying f49 quad for the kids that has no spark, the coil looked pretty ropey so i started with replacing that but ive still no spark. Now i know the CDI's and other parts are pretty cheap for these but is there anyway of testing the components first?

 

Did you find any luck I have the same problem replaced everything and still no spark .

 

Go through the tests in the "help diagnose stator" sticky at the top of this page.