Is a CDI really worth buying? Which brand?

[extremepowdercoaters]

cdi do help i have tried many cdi to just test. I have found that the $10 ebay orange box cdi performs just like the $35 ncy. I did find the the $10 blue anodized racing cdi on ebay performs better than the ncy cdi and the orange box. throttle response seem to be a little more crisp and a bit more top end. i think it has a more aggressive timing curve. only thing i suggest doing with the blue cdi is epoxy the wire straight going into the plug. they tend to move around a lot and can make your bike run bad if the pins do not go in your harness straight and correct.