Hi everyone!
I recently bought a new e-Bike. It's the 5th e-bike I've owned and the third I have bought ready to ride, having built the other two myself. This time I bought one from Walmart because I fell in love with the design. It has a 250w rear fat tire hub motor (pictured) which looks to me to be a Bafang RMG06 or similar Bafang motor. I believe it's a geared motor and I know it has a freewheel. The bike came as a pedal-assist only, but upon taking a look at the controller I found it had an unused throttle connector, so I added a twist throttle. The problem I am having when using the throttle and when using pedal assist is that the motor takes about 12-15 seconds to "spool up" after engaging power. And if I'm already riding along at max speed (20mph) and I let go of the throttle even for a split second and re-engage it, the motor goes back to 0 and slowly spools up again, which takes another 12-15 seconds. This means if I let go on a hill I lose all power for all of those seconds until it catches up to my current speed, making riding this bike quite annoying. My other low power cheap e-bikes regain full power within just a second or two after letting go and re-engaging throttle. But they have all had direct-drive motors. This is my first experience with a geared motor.
So what I hope you can tell me is whether this is a characteristic of the motor itself or if it's just a really long 'slow start' curve programmed into the controller (pictured) to make the pedal-assist behaviour smoother. If it's the latter, is there any way for me to change that on the controller? If not, and if buying a new controller will give me the more immediate power I would expect, I will buy another controller, but I don't want to do that until I know for sure, as I will need to cut wiring and void my return option on both the bike and the new controller just to try it.
I recently bought a new e-Bike. It's the 5th e-bike I've owned and the third I have bought ready to ride, having built the other two myself. This time I bought one from Walmart because I fell in love with the design. It has a 250w rear fat tire hub motor (pictured) which looks to me to be a Bafang RMG06 or similar Bafang motor. I believe it's a geared motor and I know it has a freewheel. The bike came as a pedal-assist only, but upon taking a look at the controller I found it had an unused throttle connector, so I added a twist throttle. The problem I am having when using the throttle and when using pedal assist is that the motor takes about 12-15 seconds to "spool up" after engaging power. And if I'm already riding along at max speed (20mph) and I let go of the throttle even for a split second and re-engage it, the motor goes back to 0 and slowly spools up again, which takes another 12-15 seconds. This means if I let go on a hill I lose all power for all of those seconds until it catches up to my current speed, making riding this bike quite annoying. My other low power cheap e-bikes regain full power within just a second or two after letting go and re-engaging throttle. But they have all had direct-drive motors. This is my first experience with a geared motor.
So what I hope you can tell me is whether this is a characteristic of the motor itself or if it's just a really long 'slow start' curve programmed into the controller (pictured) to make the pedal-assist behaviour smoother. If it's the latter, is there any way for me to change that on the controller? If not, and if buying a new controller will give me the more immediate power I would expect, I will buy another controller, but I don't want to do that until I know for sure, as I will need to cut wiring and void my return option on both the bike and the new controller just to try it.
