Gas smell coming from between your thighs (gasoline for all you that thought I meant something else) or out the tailpipe? I'm not big on V-twin Mikunis, but if the gas smell is coming from anywhere but the tailpipe, you need to find the leak now. It could be as simple as a float adjustment or even that the crankcase vent isn't attached to the new filter.
2013 V Star 1300 Deluxe
OEM Tall Sissy Bar
Memphis Shades Fork Deflectors
Bridgestone Exedra Max Belted Tires
Baron's RSTD 7308 bar