still having trouble figuring out what my brothers bike wont get spark. replaced coil( not the problem) checked all connections(not the problem), bipasses kill switch(not the problem) all fuses are good, bipassed plug( not problem) the only thing we think it can be is a bad cdi box( rare issue) but could be the problem. but before buying one, like we did the coil, we like to know for sure. With that said, does anyone have a cdi box we can use to test.it think one from a 530 would work also,just a different curve, but we just want to see if we can at lease get spark. any help would be appreciated.