I also bought a Rockstar (end of may delivery). I am quite surprised by the new 84 lbs weight. I owned a personalized 500W Greaser E-bike, a vintage motorcycle recreation with a very long 56" wheel base and 3 horizontal frame tubes, full steel fenders, fake tank, double post fork, 3" tires, huge front light and leather accessories. My greaser weight "only" 65 lbs. From the Bafang specs, the Rockstar motor + battery are probably less than 4 lbs heavier compare to my Greaser ( 500W/48v/14.5A ). The first Rockstar specs. weight of approx. 65 lbs seem highly probable to me. If I add 2 lbs for the rear suspension, where are the additional 13 lbs ? For the better or for worst, that Rockstar frame is built like a tank !