Hey guys and ladies. I’ve just bought a crossfire e second hand so returning is out the question, when on any pas level it seems delayed at helping out compared to my other ebike. But the problem is when cycling my Speedo only hits a max of 2.9-3.1 mph. Even when doing 20mph down a hill. I’ve taken the rear hub apart and the magnet is still in place. All wires seem good. Connections ect. Any help or advice please. I just paid £800 for the bike and it’s annoying that it’s not right. Many thanks.