1982 xr80

hey guys im new to the forum and relativly new to dirt bikes i had a question im a member of a few other forums so i know the deal with the searvh button but couldnt find exactly what i wanted to know i picked up a 82 xr80 yesterday and it doesnt wanna start i was told that it needed a spark plug so i went out and grabbed one threw it on and kicked it over a few times wouldnt start so i checked the air filter which was good and its definetly gettin fuel so i checked for spark by sticking a screw driver in the plug socket (not the brightest way to go about it i know) and got some spark is there a possibility its getting spark but not enough of it? and if thats the case then most likley i would need a new coil correct? sorry guys i know this stuff may seem basic but im a minitrucker and i know what everything is on the bike but thats about where it ends i bought the bike just for sumthin to ride around on at the shows thanks in advance for the help guys