Today I was dong my maintenance. Made sure there was no debris in the filter or airbox. Pulled the clutch & inspected the plates & hub for wear. Everything good. Fired her up & let it warm up until it was up to 60C. Wrapped the throttle a few times. Crisp responce, she sounded good. About 2 hrs later I hooked up my laptop to the Nemesis ECU. I was going to see if I could increase the engine idle RPM. She started, but was running ruff. Very littel heat being generated from the rear exhaust manifold. Ran it from about a minute & I could still grab it with my hand. I checked for spark. Its good. I checked compression. its between 160 - 175 PSI ish(its a cheap Comp tester. I know its off about 10% at 120 PSI) I checked the Injector. Its still spraying. I changed back to the OEM ECM. I still cannot get the rear cylinder to fired. wtf. Anyone with any ideas? TIA E "F" ing gads. It was the spark plug. I pulled it again. Fired it with the original plug in lead. Sparked every time. Just for shit sakes I put in another plug. A crappy old champion form my old S4RS. Fired the bike & it runs. WTF. Oh well, I am not complaining. Quite happy. Was fricken pissed this afternoon when it was + 27C.