Welcome aboard! Probably your most reliable Chinese bike brand would be Lifan. Most of there bikes are fuel injected and do come with a 2 year/12,000 mile warranty. American Lifan will stand behind what they sell as most can tell you one here. Lifan carries two dual sports. The Xpect 200 and the KPX 250 which i personally own. The KPX quality is as every bit as good as any Japanese bike out there. When it comes to dealers, Venom Motorsports has to be at the top of the list for after sales support. There's also CSC which have the TT250 but that will be a carbureted engine and is a push rod engine. Check out the videos in my signature for the KPX.
KPX 250
https://www.venommotorsportsusa.com/...d-street-legal
Xpect 200
https://www.venommotorsportsusa.com/...bike-lf200gy-4