I have a 2003 Vstar Silverado. I road to work one day and it would start after work. The front cylinder had a spark using either spark plug but the rear cylinder had no spark with either spark plug so I assumed this was a coil issue. I replaced the rear coil and got new plugs and now neither cylinder has a spark. I did charge the battery and checked the fuses and it still doesn't spark. Has anybody ever heard of this? Any suggestions?