#2 Cylinder is not firing
 

ok i have a 1986 (i think im not sure, just bought) suzuki gs-550E, and the guy told me it was just carbuerators needing to be cleaned out... so i cleaned them out, but now the #2 cylinder is not firing. the #2 carbeurator has gasoline in it, and im pretty sure it has spark (i shocked the hell out myself finding out) but my dad says it could be the ignition module... any help on what it could be or perhaps somewhere that i could find the useful info?