Old Guy New Bike
New Member
- Region
- Canada
Did a short test ride and bought a used (Costco Urban Ryder) yesterday... all seemed good. 500 watt 8-Fun motor with 48 volt, 13 amp/hour battery.
Got it home and found when I use throttle and open it up or go to assist level 2 or 3, it runs for about 10-15 seconds then loses all power, LCD display goes out, all is dead. Seems if I just plod along in Level 1 it will go farther.
When it dies, I cycle the key off/on, will work again for 15 - 20 seconds but then the same results of it losing power. Battery is about 51.8 volts Powers up properly, I checked and double checked all the connections, all seems tight and good. Thought maybe a bad connection and going over bumps would cause this but it also happens when I tested the bike in a stationary position (my apartment).
So I ran a little test, disconnected the rear brake motor cut-out switch and with rear wheel off the ground, started throttling it and runs great with no load, hooked up my multi-meter, battery is about 48 volts while running (no brake), applied the rear brake a little to simulate a load, volts drop a couple to maybe 44 - 45 volts, I apply more brake (not too much) and within maybe 10-15 seconds all power goes out including LCD display. When power dies, battery (multi-meter) reads about 12.7 volts and continues to drop slowly from there, if I cycle the key off/on, it's back to 51.7 volts. I did this 7 or 8 times with the same results. The controller was made in 2014, bike was sold brand new last summer, I bought it yesterday with 200 kms (120 miles) on it. Motor sounds quiet and good throughout testing/riding. Nothing gets hot while testing (other than the brake... grin). I don't know a lot about e-bikes so would this be a battery, motor or controller issue?
Got it home and found when I use throttle and open it up or go to assist level 2 or 3, it runs for about 10-15 seconds then loses all power, LCD display goes out, all is dead. Seems if I just plod along in Level 1 it will go farther.
When it dies, I cycle the key off/on, will work again for 15 - 20 seconds but then the same results of it losing power. Battery is about 51.8 volts Powers up properly, I checked and double checked all the connections, all seems tight and good. Thought maybe a bad connection and going over bumps would cause this but it also happens when I tested the bike in a stationary position (my apartment).
So I ran a little test, disconnected the rear brake motor cut-out switch and with rear wheel off the ground, started throttling it and runs great with no load, hooked up my multi-meter, battery is about 48 volts while running (no brake), applied the rear brake a little to simulate a load, volts drop a couple to maybe 44 - 45 volts, I apply more brake (not too much) and within maybe 10-15 seconds all power goes out including LCD display. When power dies, battery (multi-meter) reads about 12.7 volts and continues to drop slowly from there, if I cycle the key off/on, it's back to 51.7 volts. I did this 7 or 8 times with the same results. The controller was made in 2014, bike was sold brand new last summer, I bought it yesterday with 200 kms (120 miles) on it. Motor sounds quiet and good throughout testing/riding. Nothing gets hot while testing (other than the brake... grin). I don't know a lot about e-bikes so would this be a battery, motor or controller issue?
