CG125 - fitting the engine,oilchange

Fitted the engine that looks most likely to run. Changed the oil, jury rigged the ignition and got a spark. I put a bit of fuel in the carb float  - the engine fired but didn't run. A bad misfire as if the timing is way out. Next thing I'll have to do is investigate why. Pleased I've got a good spark though. I took off the valve cover and was impressed at how clean the valve gear looked.