83.x miles per hour (Trail Tech Vapor Digital Dash, Subaru follow car, and Garmin GPS verified speeds) on my Bashan WILL 200 Dual Sport... bike needs some better tires and name brand Steering Head bearings before I go any faster
Have held 70+ mph for 2 or so hours at a time going to and from my home and the mountain trails on I-25
197cc Lifan engine with: "emissions pump delete" (exhaust fresh air pump crap), airbox delete for an UNI Pod filter, Mikuni cloned carb, stock exhaust head pipe (minus a mountain weld, still has the "Cat"), FMF Turbincore 2 Muffler, Denso Iridium Spark plug (the $50 racing version), a Denso Coil on Plug (taken from a liter bike), ceramic wheel bearings, and 17t/39t sprocket combo to reach those speeds