Honda FES250 (nss/reflex) lost spark

[Deleted]

From the first start had ruff idle. Cleaned the carb, checked the motor (honed, lapped and new rings). Same ruff running.

There was always some spark, but after many test starting sessions I burned ignition side of fuse (maybe some open wires ). After that I've had irregular spark and now none.

Made simple wiring harness. Nothing more than basics. No TPC sensor or anything else. No spark. Ignition pulse gave me more than 0.7v at peak.

I'm bypassing stator. There's only ignition pulse generator, ECU, Ignition coil and battery.

What am I missing?

[pinkscoot]

Spark plugs do fail and can be bad new, plug caps are known to go bad as well as the coil wire. Check you wiring harness again, maybe a bad wire there.