I bought the black YM1 bike first and checked it out thoroughly. The bike performed well and I only had one issue with some the rear spokes being loose causing the rear wheel to wobble. Tech support was very good and helped me resolve that issue. I was very pleased with the 1st bike so decided to order a second YM1 bike in the blue color.
I was expecting the new blue YM1 to be exactly like the black bike I purchased a couple of weeks before, but I ended up being very disappointed. The blue bike had cheaper controls and LED screen (see pics) and more importantly, did not perform as well ! The black bike can reach speeds of 28 MPH, but the blue bike only reaches speed of 22.5 MPH. The new controller on the blue bike allowed me to change the max speed to 100 in the user parameters like the black bike, however, the blue bike still would not go over 22.5 MPH.
Also, since the 2 bikes had different LED control panels, the PAS assist level speeds were different and made riding next to each other very awkward. One bike would be cruising at a faster speed than the other so that person would have to constantly stop pedaling for the other bike to catch up. I changed as many settings as possible on both bikes to try to adjust to where we could ride together pedaling and cruising at the same speed, but had no luck. The only way around this was for the faster bike to control the speed by holding the throttle just right the whole time pedaling next to the other slower bike. This was also very awkward and my hand would get tired holding the throttle the whole ride.
I reached out to tech support and they could not resolve the performance issues. They told me the fix “would require replacing not only the controller but also the motor and the LCD. Unfortunately, this level of modification is not feasible as it would involve significant changes to the bike's original design and specifications”.
The best they could do was give me a partial refund on the blue bike, but that still left me dissatisfied. I wanted 2 bikes that were exactly the same except the color. The product description on Walmart shows the same bike with 2 available colors. There are no details and descriptions saying the bikes are different. I feel like I didn't get what a wanted and I'm stuck now and just have to live with the performance issues.
I wrote this review to warn other potential buyers who are buying 2 bikes, or even 1 bike for that matter, that these bikes differ in performance and features. Hope you get the better one if you decide to purchase a YM1.