BTW, here's the law in TX that applies to mopeds: Vehicle Registration FAQs
Click on "What about my moped", about half way down the page. As you can see, a bicycle can't be registered in TX as a moped. That means that we have to follow the 38cc or less bicycle restriction. Now, whether or not you do so is completely up to you, of course. Nice build. I vote you just don't ride it overly fast, so they'll never find out that it isn't a 38cc.