1978 Honda Cb400t Hawk II Help New guy

[Spintable10]

Hey everyone! Well I am having trouble with my 1978 Honda Cb400t Hawk II. One day it was running then the next day didnt. I did all the basic trouble shooting checking spark, checking readings, ect because of all of this I have replaced the coil, battery and rectifer. The generator is giving me a good reading also the pick up and the kill switch and ignition key are working. All that leaves is my CDI Box. I dont have spark at all there was one time it randomly sparked once but never did it again. I have check the new parts and they all read good. My CDI Box is a TIAO1-20. I know its kinda hard to test them with out a good running bike. I was just wondering if anyone has had this problem and it was something else before I go out and try to find a new CDI box. Thanks.

 

[Sonreir]

Not uncommon for the old Honda CDI boxes to give up the ghost after about 30 years. I've had to replace more than one. Do all the basic troubleshooting and if nothing comes up, it's usually time for a new box.