Welcome to the forum.
A black 66. Well for my first build I purchased one from BikeBerry. The Flying Horse slant. It has a warranty that's provisional. You have to send the defective part to them for evaluation. I got around that by buying a backup engine. I also did not use the sprocket assembly that came in the kit. I purchased an adapter, 36 tooth. Once you start your motorized bicycle more than likely you'll want to upgrade and do mods. It's rare that a builder doesn't. But you joined a great forum, that will save you a lot of time and aggravation. I've been around for many years and I'm amazed at how much I've learned from this forum. Show us some pictures of your build please. Have fun and be safe!