Recent content by syukanzaki

I've just finished assemble ND72450 and PowerfulLithium battery today. Motor is QS3000w72v Last issue was actually not because of controller, but battery. (cheap chinese battery even it's half a year old.) Now my motorcycle runs super fast and smooth but I have 2 new issues. 1. Speedmeter...

I guess I figured out the problem. I didn't expect battery issue because I just changed it about 2 months ago. But it looks like the battery can't handle enough peak current now even it's fully charged. (battery indicator goes 0 when deacceleration starts, and that's why it often happens on...

Thank you! I would go for 72450 then. I appreciate if you share your settings and tire size.

I've tried all I can predict but nothing works. I'm planning to replace controller to 72260, 72360 or 72450 but not sure which one is the best for QS3000w72v motor. Battery has 80A BMS. Does anyone have suggestion or personal recommendation? I don't really mind the price.

What I've tried so far. Auto leaning - still same issue. When I did full acceleration wheel off the ground while auto learning, I realized acceleration is smooth and meter reads 120km/h. So my guess is it is torque issue. Set gear ratio 100% up to 5500rpm - still same issue. I believe this is...

Please help me if you have any idea, controller is ND72240. My motorcycle recently start acting very weird. When I fully accelerate, around over 70km/h, motor starts deaccelerate (feel like engine brake) some kind of limiter? and having jerky motion. I first thought it is limitation based on...

ok thank you. That is kind of I was expecting. I'm gonna stick with the same motor and controller then.

Hi all. I recently finished fully customizing e-motorcycle except controller and motor. Controller is ND72240 and motor is QS3000w with a new 72v LifePO4 battery, top speed is around 57mph. I know 72240 is not really strong enough but I want to make this little bit faster (5~10mph+ top speed)...

Ok, one throttle is blown by mistake but finally 2WD works perfectly! I still have lots of exterior work but hardest part is done. Thank you all, especially TommyCat. I use base model and customize, not full scratch. I shouldn't post pics here when all done?

>A meter reads the voltage potential between two points. With the switch open you have a potential of 54vdc between the two points. (Power on one side, 0vdc on the other side.) With the switch closed, or making a direct connection between the two sides of the switch, you have 0vdc potential...

I found this WuXing display diagram. This probably shows the same diagram except orange. (There's no orange but gray.) Yellow might be brake signal? Brown and Gray are switch lines which is 54/0v : off/on. Now I connect Brown, Gray and White (signal) but still only 2nd motor doesn't work. Is...

>Are you reading one side of the key switch to the other? = 54vdc off,0vdc on…? yes, orange and white wires on the key switch picture I posted. 54v when it's off, 0v when it's on but everything works ok.

I start checking all wires now. I'm just wondering one thing. Reading from key switch: When key is off > 53.2v Turn on the key > 0v (display on, motor on.) This is opposite from my expectation. Is this normal? This means key switch doesn't "connect" power through, but it shuts out and relay?

Thank you TommyCat always. I have same picture and tried to make diagram myself. But the problem is Bafang uses different diagram and different wire color combination, this always makes me confused. 1T4D cable manufacture is "JUNYU" and most other parts manufacture is WuXing (Star Union). I've...

Thank you TommyCat. First of all, display looks like exactly same model but mine doesn't have power button. So display is not 7pin, but 6pin. (I guess it's just bypassing key to power.) and this probably makes lots of ppl misunderstand. All connectors are like this (this is 1T5 cable) and...