New to e bikes and want just a tad more speech out of my Windone e2 bike. It's a 750w peak, 500w nominal motor, 48v 13.5 ah battery. Top speed is 28 mph for the first 10 miles then drops off slightly. I would like to see 30-32 mph out of it. Can you get this by doing a 52v battery and changing the display setting to 52v or need a controller? What are my options that are semi budget friendly. Thank you