Seeking guru with clue. I have a 2012 Slim(103 big twin) with about 2500 miles on it. Not long ago I noticed it was a little sluggish when I got on the throttle. The problem progressed the next couple times I rode it to the point it was sputtering and backfiring until it became impossible to start. After a lengthy time at the dealer, they diagnosed it as a bad fuel pump and replaced it. It ran great for a few weeks and about 500 miles and then the exact same mechanical symptoms started up again. I drove it about 150 miles to my mom's house and noticed it was a little sluggish. When I got on it the next day to ride home it was sputtering and backfiring to the point where it stalled. I barely got it back to my mother's house. The only diagnostics I have from the dealer are that the mechanic said it had about 60% of normal fuel pressure and he also said there were no cracks or holes in the fuel pump lines. I know they looked at the injectors and sending unit and determined the fuel pump to be the issue. What in the world would allow it to run fine for a few hundred miles with a new fuel pump and then have the same issues all over?