I have a 76 xlh 1000 sportster and just put a starter on it. It ran like a scolded dog and after a couple of stops it still fired great then all of a sudden it wouldn't start and was sputtering after I finally got it started and running down the road. At higher speeds going down the road it sounding as if it was only running on 1 plug but I changed the plugs and still didn't help. Someone mentioned it could be the coil because my battery had drained down one night when the key was left on (accidently). There is no visual crack in the coil, but how can I check the coil? THe plugs are getting spark, but I'm not sure if it's enough ohms to fire the gas. The plugs smelled of gas. Points are set at .0017 and I've checked everything - new points, gapped the plugs, new spark plug wires. Any suggestions, I got a poker run this weekend and want to make it! If not the coil what else can it be? I'm a first time user at this site and heard it was really good, please help.