DT125R FORUM

The detail about it cutting out like a rev limiter before it died points hard at the coil rather than fueling. If it were the carb, dribbling gas in the cylinder usually gets at least a cough. While you wait on the coil, cleaning those earths and getting a battery in the circuit costs nothing and rules out the regulator spiking the CDI. A TMX30 is a big jump from stock, so I'd get it firing on the original carb first before swapping. Bone dry from sitting is one thing, but make sure the crank seals aren't dried out too.

The point about the flasher unit is worth emphasizing — a stock thermal unit simply won't trigger on the lower current draw of LEDs, regardless of how clean the diode work is. I'd second the meter check too, since a reversed diode is an easy mistake that's frustrating to diagnose once everything's wrapped up. On the 2005 versus 2006 harness question, that's the detail I'd want confirmed before assuming the method transfers. Wire colors and connector layouts can shift between model years even on the same platform, so verifying both before soldering seems sensible.