05 brute 650 sra. loses spark on the rear plug after 3 seconds of cranking. switched coils, and the problem stays with the rear wiring. checked voltage to both coils and they both read 12 volts while cranking and hooked up to coils. bypassed rear rollover with a resistor, steady at 2.5 volts. not sure where else to look at this point. ive seen other threads with the same problem, but no one has ever said what it was. as a side note, i read about the grey ignition wire needing to be 6 volts, for whatever reason mine is 12. i put 5 volts to it and still no change.