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Brought home the father-in-laws 1988 TRX 300 2x4 as it would not run. As I was trying to figure out what was up, I did the usual pull the plug and see if I had fire by kick starting because the battery was DOA. No fire, though it had been running the last time he rode. Just for kicks, I hooked up a jump pack to the battery and attempted to turn it over. I was encouraged when the lights came on and I got a clicking sound coming from the starter solenoid. I then took off the coil, cleaned it, cut the wire back a bit, and reinstalled the plug boot. I replaced the POS champion spark plug with the correct NGK. I then cleaned the two 15A bottle fuses and their holders. I took off the carb, knowing it was a mess and cleaned it. I put it all back together and checked for spark. Not surprisingly, no spark. However, what did surprise me was that when I hooked up the jump pack, I am no longer getting headlights or a click when I push the electric start button. As far as the no spark, I'm sure I'll have to get a new CDI. However, if it is not getting juice along with the rest of the electrical system going up to and including the headlights, then a new CDI will not really help, unless the headlights go through the CDI. I did bang on it a bit as was suggested in some of the forums. Perhaps this did more harm than good. Any suggestions, recommendations, or opinions would be appreciated.