Discussion Starter · #1 ·
I have a 1990 fourtrax 300 that was not getting any spark, the plug is good (tested on other four wheeler) and I replaced the wire going from plug to cdi box. I dod not get any spark and put on cheap cdi box (did not know importance of poem at time). It immediately smokes and blew during start. Do I need a new oem cdi box or is the old one possibly good and the problem is something else?