That two spark plug idea didn't work, It revved with no control from throttle.
I put a decompressor from a power torque on and a carby from a power torque on and it didn't fire , need to see if it's getting fuel. I primed it a few times...
It's good to have heaps of spares to interchange to diagnose the problem. That what I do with computers.... from the kerbside or dumpster....
I can't reveal my real name as I haven't paid much for mowers or computers pushbikes for years.......
I'm not a recycler , I'm a rescuer.............
cheers
speedy