Lately my bike, a 2005 Suzuki Boulevard C50T, has been backfiring here and there.. and occasionally it sounds like its backfiring from the front. The pop is not coming from the muffler but rather from the engine itself! Also, I'm not riding it hard, just casually cruising from home to college to work and so on.. smooth roads, pretty flat, and easy-going, but it seems after I ride for awhile, when I stop the bike, it will sputter and go dead, and then start right back a minute later with no problem. It seems like its overheating, but yet I'm not riding it hard and the bike is in perfect condition. I just replaced the radiator fluid, oil, new oil filter, and replaced every fuse. I'm fixing to buy new spark plugs... maybe that will help, and I've considered purchasing a new battery. Can anyone give me some help on this? If you recognize this problem or have any pointers for anything I can do, no matter how small, to make the bike run better, all input would be greatly appreciated. Also any suggestions on brands of radiator fluid, oil, spark plugs, battery, etc. to use.