Problem with a 1991 Dyna

I am looking for help on a 1991 Dyna. I was riding the motorcycle the other day and it needed gas, so I filled the gas tank up. The weather here is somewhat cool so I decided to hang out inside the gas station for awhile. When I came outside, I noticed the bike cooled off quickly, so I had to choke it to get it stated. About 20 seconds after it fired up, it began to sputter and eventually shut off. I fired it up again and it stayed running, but it sounded terrible. I checked the spark plugs and they looked okay. Today, I fired it up again, but it seems as though the back cylinder isn’t firing. Does anyone have any suggestion on what the problem could be?

From my experience, there are several things that can contribute to your bike’s problem. It could be old gas or your running it too low on gas causing dirt in the tank to be pumped into the fuel line. It could also be bad gas at the gas station or a broken vacuum line. In regards to the spark plugs, make sure they are gapped to the right measurement. You can go online or call your local dealer to find out what the correct gap measurements are, but in my overall opinion, I think your problem is gas related.

yeah sounds like bunk gas i seen this happen recently to six bikes at one station also i have seen that same problem and it was the ignition module but i would rule out engine mechanical problems as in fuel and compression