Chillax said:Anyone buy one of these? Thoughts?
https://nextuptrends.com/products/copy-of-dp-ninja-electric-motorcycle-scooter-e-bike-5000w-72v-pink-adult-motorcycle-1?variant=13244718645309
Dui said:Chillax said:Anyone buy one of these? Thoughts?
https://nextuptrends.com/products/copy-of-dp-ninja-electric-motorcycle-scooter-e-bike-5000w-72v-pink-adult-motorcycle-1?variant=13244718645309
I have a very similar bike, but it was a DIY build, didn't purchase it already made. Plus I live in the country where they are produced, so it's safer to order without fearing scam.
I can tell you that this is a good basis, the frame is a bit crappy but does the job, the front fork is ok, rear one is a bit rubbish but easy to swap.
As for the motor, controller and battery they do not seem to provide the specs on your link, so I couldn't tell. But that information is extremely important, you want a very nice battery for this kind of high power setups, otherwise it will just end up into either a fireball or a dead battery.
The biggest issue is probably to know wether or not this is a reliable supplier, many people get scammed so this is a bit of a gamble.
If you wish to go for a gamble, then don't be stupid: purchase the naked motorbike: without motor, without battery and without controller. It will cost you way less money which is good in case you never receive anything. Plus you'll be able to just drop in a motor, a battery and a controller of your choice, it will be relatively easy and you can make absolutely sure you'll have a quality setup.
Sunder said:I'm trying to build one with slightly higher performance than that, using the same frame.
From the feedback I've been given, there is no way those performance specs are real.
From owning a Vectrix, I do know cruising about 60mph on the flat takes about 8-9kw,
Dui said:My motorbike has a 3000W rated motor and is happy to reach 120km/h (75mph)
That being said, the actual power drawn from the battery at this speed (according to my smart BMS) is around 8KW.
No problem at all, it works perfectly fine.
If this bike has a 8000W rated motor, I'm 100% sure it can reach 100mph without any problem. Whether or not it will reach this speed will only depend on its controller, and/or its battery voltage.
Sunder said:I guess it goes to show how rubbery these specifications are (in general. As eBikes.ca says, there's no such thing as an X watt motor). You could reach that speed, but there's no way you'd be able to sustain it without a thermal rollback.
I'm building a QS 273 (8kw) model, powered by a Kelly KLS-14401 8080. The winding I chose should have a no load speed of 153km/h at 144v, (the nominal for my battery), so maybe around 125km/h, or a touch more with field weakening.
I have been told by the manufacturer, 21-23kw is safe for up to 30 seconds, so I have no doubts I can get pretty close to no-load speed for significant periods of time.
The winding on that bike to be able to get to a real world 105mph (according to the review), on only 72v must be insane.
Anyway, I guess I'll see what my bike is like when it's done. But with a much bigger build, I am being told that reaching the specifications they list are a bit of a stretch.
Sunder said:You're the first person to tell me I haven't under spec'd my build. I hope you're right.
I'm not expecting a Hayabusa out of this, but I wanted something closer to a 600cc performance, (0-100 at least) than a 250cc.
neptronix said:When i see false claims from vendors, i tend to step away. It is a sign of more bullshit to come as an owner. What else were they not being honest about?
MJSfoto1956 said:neptronix said:When i see false claims from vendors, i tend to step away. It is a sign of more bullshit to come as an owner. What else were they not being honest about?
Something the Chinese don't yet understand about (web-savvy) American buyers. They assume "there is a sucker born every minute and two to take them". Wait, that was a PT Barnum quote!
Sunder said:1000 smart people might have left them alone, but 100s still got ripped off.
Chillax said:So after reading all this, it seems to be *possible* this is a legit bike, but none of you have heard of anyone that bought one from this site without any issues?
It's too bad there isn't an easier way to confirm if something like this is bullshit.![]()
MJSfoto1956 said:Something the Chinese don't yet understand about (web-savvy) American buyers. They assume "there is a sucker born every minute and two to take them". Wait, that was a PT Barnum quote!
Sunder said:Problem is, they're right. I've seen someone selling 12,000mah 18650s, and hundreds of 5 star reviews gushing about how good they are, and how it gets a longer life on their torch/vape etc.
1000 smart people might have left them alone, but 100s still got ripped off.
Dui said:Soooo.... yeah, maybe good to check before accusing a whole country :lol: