Starting a Vintage Vespa for the First Time in 28+ Years

1974 Vespa 90 that sat in the desert since 1990. Not sure what it did before then. Spent over a year working on it slowly in my free time. I have no prior experience working on anything like this. Blog: kaitlinsvespa.wordpress.com Edit: Some people have been mentioning the high revving with the possibility for an air leak. Thanks for the tips and I have some ideas of what that could be so I'm looking into it.