*** PICS AT THE END ***
Picked up a 2020 Rize liberty bike a month ago from one of our local “for sale” sites. It was advertized with a damaged motor harness.
Turns out the damage was much more extensive and all, in my opinion, could have been avoided with a $10-$15 Torque arm.
I have little experience with eBikes but some with manufacturing systems with large HP electric motors. And this is where I learned the importance of a torque arm.
This hub motor is 48V with 1000W. And all this torque is suppose to be kept at bay with a 3/8” thick aluminum drop out and a short “lip” torque washer.
The aluminum drop out’s did not have a chance. The steel shaft ripped right through, even snapped one of the drop outs.
At that point, the hub motor shaft spins and tears the harness.
Rize does not sell motor harness but was very quick to offer to sell me a new motor for $450+ tx and shipping. At this point I didn’t bother to ask how much a new swing arm (with new drop outs) would cost.
At least a $1000.00 in damages on a 2 year old $2500+ bike because of a missing $10-$15.00 torque arm.
Couldn’t find the ¼” OD diameter OEM motor harness so I got a larger OD harness extension and “macgyvered” it to the hub motor.
At this point I needed to address the rounded drop outs. So I 3d printed some samples that seem to look good and had a local shop cut them out of ¼ stainless. One for each side taking care of the torque arm issue this time around. ½” thick total of stainless should avoid any shaft spins.
Everything came together nicely….mechanically that is. Electrically it’s now giving me issues I don’t even not know where to begin.
When I throttle, after a short while, all power shuts off completely. I can turn it on again but it always shuts down after a short while. I thought it might be the throttle so I disconnected it and tried only the PAS system. The bike shuts down in the same way.
Any suggestions on where to look or what to do would be appreciated. *** Keep in mind I’m a simple minded handyman with no special tools other than a Volt meter.
Voltmeter shows 53.4 volts after a full 24 hour charge.
Thank you in advance to everyone.
Picked up a 2020 Rize liberty bike a month ago from one of our local “for sale” sites. It was advertized with a damaged motor harness.
Turns out the damage was much more extensive and all, in my opinion, could have been avoided with a $10-$15 Torque arm.
I have little experience with eBikes but some with manufacturing systems with large HP electric motors. And this is where I learned the importance of a torque arm.
This hub motor is 48V with 1000W. And all this torque is suppose to be kept at bay with a 3/8” thick aluminum drop out and a short “lip” torque washer.
The aluminum drop out’s did not have a chance. The steel shaft ripped right through, even snapped one of the drop outs.
At that point, the hub motor shaft spins and tears the harness.
Rize does not sell motor harness but was very quick to offer to sell me a new motor for $450+ tx and shipping. At this point I didn’t bother to ask how much a new swing arm (with new drop outs) would cost.
At least a $1000.00 in damages on a 2 year old $2500+ bike because of a missing $10-$15.00 torque arm.
Couldn’t find the ¼” OD diameter OEM motor harness so I got a larger OD harness extension and “macgyvered” it to the hub motor.
At this point I needed to address the rounded drop outs. So I 3d printed some samples that seem to look good and had a local shop cut them out of ¼ stainless. One for each side taking care of the torque arm issue this time around. ½” thick total of stainless should avoid any shaft spins.
Everything came together nicely….mechanically that is. Electrically it’s now giving me issues I don’t even not know where to begin.
When I throttle, after a short while, all power shuts off completely. I can turn it on again but it always shuts down after a short while. I thought it might be the throttle so I disconnected it and tried only the PAS system. The bike shuts down in the same way.
Any suggestions on where to look or what to do would be appreciated. *** Keep in mind I’m a simple minded handyman with no special tools other than a Volt meter.
Voltmeter shows 53.4 volts after a full 24 hour charge.
Thank you in advance to everyone.