Motorcycle Starting trouble ? has been sitting for 20 years. Its a yamaha Ls2?

I have a Yamaha Ls2 That i got for free and am trying to fix. It hasn't been started since it first started sitting about 20 years ago and I have opened up the engine as much as possible and so far its looking like i'm not getting a spark at the spark plugs. I replaced the ignition coils and i know the battery works. Any help would be great its my first project motorcycle.