I bought an 89 blaster cheap. it has a freshly rebuilt top end. dude washed it and it never fired again. a new stator, coil, cdi, key switch(was missing), and plug later and still no fire. it has some wires disconnected under hood. yellow and green for headlight and a seperate harness has a black, brown and green. where does the black wire go? any help would be greatly appreciated.,

 

porobably a ground. remove your TORS and you will most likely have spark. Three spots one is on the end of the carb grey plug 2 wires another is under the hood white plug 3 wires and the last is also under the hood but the wires come from you throttle. That one is a black plug 2 wires.
hope this helped.