This is the logo on the side of my motorcycle gas tank. I’m trying to find out the name of the font or an alternative to match it.

Hello menard87 and welcome to the forum. This is not a font, I suppose. Look at the letters a and r that occur twice. They are different.

The Harley Davidson writing is possibly handwritten as Thomas pointed out, however the differences in the lowercase "a", is more a result of the curvature of the fuel tank and the angle of the photo, plus there is only one "r", maybe the v and i is confusing. There are soooooooo many script hand written looking typefaces being produced almost daily it is impossible to keep track of them. I suspect you might find something similar by searching here:

https://www.dafont.com/theme.php?cat=603

Good luck and happy searching.