I recently purchased a slightly used (17km) Hiker Pro. It has a huge 48v 60ah battery and a 750W motor. I've played with all the parameters that I have access to, and the top speed is still roughly 36kmh. I've looked for a limiter cable in the controller( black and white wires plugged together) and that doesn't exist on this bike. I've adjusted the top speed in the parameter to 60kmh. I tried the "hold the brake while turning on the display" trick and that didn't work. I'm able to log onto the controller with a phone app, but the app requires a password to go into advanced settings, and I have no idea what that password is. I tried all the passwords I could find online, such as 1212, 1234, 0000, 2020 etc etc. It's super frustrating because I can't get the full potential out of this bike. Its very heavy, and I'm no exactly light either(bike 117lbs, me 220lbs). So, going up steep hills seems to be taking bit of power to make it up. I really hope someone has figured this one out.