Re: Bike engine kits??
You need to up your budget a little, maybe to 250 or so, or you are probably looking at a used kit. I say that because there are little incidentals that you may need, such as machining the drive sprocket, getting a quality oversize tube adapter, things that will become obvious after you start. The quality aftermarket parts are worth it, believe me.
Also, if you buy from a quality vendor, I used ThatsDax, you pay a little more, but will have someone to help when needed. These kits are NOT plug and go, and come with no instructions to boot.