Theodore Voltaire
1 GW
To avoid confusion this bike is a Stealth Electric Bicycles 2013 Bomber #412 made in Australia, not a chinese clone. It came stock from the factory equipped with a Crystalyte 5403 motor, 65 amp Infineon controller, Cycle Analyst V3 computer, and a 72v 18ah LiFePo4 battery. It was accuately advertised as a 4500w, 50 mph bike. I've never had any complaints about the performance, and it's always been as dependable as an anvil, but after 9 years it suffered it's first major failure. A hall sensor went out, and instead of turning it off right away, I tried to ride it home, and the controller also failed. Rather then go back with stock parts, I decided to upgrade to more modern componets, so I purchased a new QS205 motor advertised as 5000w, and a Kelly KLS7218S controller which is a 80 battery amp, and 200 phase amp controller. I replaced my battery 2 years ago with a 72v, 35ah, with a 100 amp bms which is still in good shape. Since the CA in built into the frame I decided to utilize it for the speedo, and volt meter finction, but the wattage readout became redundant with the Kelly controller so I didn't hook that part of it up. I've been riding the new setup for almost a month, and it's been working great with noticeably more acceleration, and slightly higher top speed of 55 mph. The efficentcy seems a little better too, I estimate 5 to 8% better range at the same speeds. Overall performance is a mild 20% improvement over stock, and the bike feels, and rides exactly like it always has, only faster.
I'm going to describe this process in reverse, starting from now, and going backwards in time. This is how the final result looks.
I'm going to describe this process in reverse, starting from now, and going backwards in time. This is how the final result looks.
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