Aprillia RS 125 - Spark plug not sparking inside Head?

motor needs fuel/ air /compression/and ignition at the right time.wouldent be the first time i found pulsers back plates sliped /lost key drive on rotors,etc.buy a can of easystart.this stuf can eliminate a lot of guess work.remove air filter and spray a SMALL amount into the intake while trying to start it.if it cough and try to start pulse small ammounts into same.while holding throttle open,u can actually get an engine to almost tickover using this test.BUT no cough,no splutter ,no reaction to gas means engine/internal or ignition fault.if runs on gas?then its fuel supply/carb fault.easystart is cheap .

caine
June 2008