A little about my sled before i ask the question. It has a 09 nitro skid and 153" track, 38mm Mikuni flatslide carbs, throttle block from viper, K@N pods and pre-filters, psi tripple pipes, air box taken out, team secondary rebuilt primary, pulls 8900-9000rpm. I don't know if its just coincidence or a common problem but my middle coil has crapped out 3 times on me now. Not the ends, but middle each time. WTF. Does anyone know if the coils all fire at the same time?? They must because they are wired in sequence and power wires on each end. If you disconnect any wires nothing will run at all, but the middle coil does not send a spark. I switched it out and bursting ear drums again. Getting expensive at $80 a pop. ???