Chillax said: Anyone buy one of these? Thoughts?

https://nextuptrends.com/products/copy-of-dp-ninja-electric-motorcycle-scooter-e-bike-w-72v-pink-adult-motorcycle-1?variant=

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.

Dui said:

Chillax said: Anyone buy one of these? Thoughts?

https://nextuptrends.com/products/copy-of-dp-ninja-electric-motorcycle-scooter-e-bike-w-72v-pink-adult-motorcycle-1?variant=

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.

This is what I'm hoping to learn by coming here. They say they've sold 500 in the US - hoping someone here would have heard of them. Well I wouldn't trust that statement, especially since there are so few customers reviews on their website.
They also have an ebay account, with 13 reviews, all unrelated to their ebikes (they sell various other things like irons, deep friers and other weird stuff). I have a hard time to believe that if they really did sell 500 of these there wouldn't be much more comments than this.

Their website doesn't seem to give any information about where this company is supposed to be located.
They're using a gmail address, which is a bit weird for a legit company (though not totally impossible, just a bit unprofessional).

Maybe you should try to find out where they are located and go see for yourself, if it's not too far from you. Or maybe some nice folk of the forum could go and have a look if it's too far. Other than that I wouldn't really take that bet, bucks is a lot of money to get scammed.

Seems like it happened recently to this fella for a similar bike, I don't think the seller is the same though:
https://endless-sphere.com/forums/viewtopic.php?f=10&t=

Dui said: My motorbike has a W 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 W 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.

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- . 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: 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- . 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.

I think you are underestimating a little these motors. I don't really know where their ratings actually come from, but in my experience they are quite underrated.
My bike's config is a QS W 16 inches hub motor, with a Sabvoton controller boosted at 510 Amps per phase and a 76V Battery. Without flux weakening I was reaching something like 95km/h on flat roads, and with my current flux weakening setup it is around 120. I don't actually remember how my flux weakening is set, probably around 50Amps but I'm not entirely sure.

I reach this top speed every day since I have a few relatively long straight lines between where I live and my workplace, and it sometimes get real hot during summer here. Never had a problem with the motor overheating so far, it still works fine (2 years already). What seems to make it heat the most is acceleration actually, probably because it doesn't stay in its most efficient range.

My old scooter had a 10 inches W motor with a Sabvoton controller @350Amps per phase and was able to reach 100kmh with the flux weakening. Had it for around 4 years and it still works fine.

That being said, I live in a big city, so it is possible that it might be a different story if you ride on a freeway for more than 10 minutes at that speed. But realistically, who does that?

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.

It depends what kind of 600cc you're targeting since they vary quite a lot in specs depending on which one.
I never tried this controller of yours, but according to the specs it seems pretty good, 400Phase amps at 144V isn't bad at all.

I can't really say precisely what you should expect from it, but to give you an idea, we used the 8KW motor together with a Mobipus and a 76 V battery, and got around 5 sec on 0-100km/h. I suppose your bike will do better than this because your voltage is quite higher, so probably less losses and less motor saturation (Motor saturation is likely to be why we couldn't get better accel figures in our case)

Anyway, you'll have a lot of fun with your bike, it won't be weak that's for sure!

MJSfoto 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 s, and hundreds of 5 star reviews gushing about how good they are, and how it gets a longer life on their torch/vape etc.

smart people might have left them alone, but 100s still got ripped off.

Maybe, just maybe, before starting to trash talk the chinese, it could be good to make sure that this seller is indeed chinese. :wink:
I see nothing on their website that can lead to this conclusion, the number seems to be a US format and they use a gmail address, which is not available in China (at least not without using a VPN, which would be a hassle), the english doesn't seem too bad to me.
The bikes are manufactured in China, that's for sure, but what isn't?

Soooo.... yeah, maybe good to check before accusing a whole country :lol:

How Fast Can an W K5 Ebike Go?

The W K5 ebike can achieve speeds exceeding 75 mph (120 km/h) under optimal conditions, making it one of the fastest electric bikes available today. This impressive speed is influenced by several factors including rider weight, terrain, and battery capacity.

KingChe are exported all over the world and different industries with quality first. Our belief is to provide our customers with more and better high value-added products. Let's create a better future together.

What Factors Influence the Speed of an W Ebike?

Several elements determine how fast an ebike can go:

1. Motor Power: The primary factor is the motor's wattage. An W motor provides significant power, allowing for higher speeds compared to lower-wattage models.
2. Rider Weight: Lighter riders typically experience higher speeds as there is less weight for the motor to propel.
3. Terrain Conditions: Flat surfaces allow for maximum speed, while inclines can reduce speed significantly.

How Does Rider Weight Affect the Speed of an W Ebike?

Rider weight plays a crucial role in determining speed. Heavier riders may notice a decrease in top speed due to increased resistance against acceleration. For instance, a rider weighing around 150 lbs (68 kg) can expect to reach higher speeds compared to someone weighing 250 lbs (113 kg).

What Terrain Conditions Impact the Speed of an W K5 Ebike?

The terrain significantly affects performance:

• Flat Terrain: Optimal for achieving maximum speeds.
• Hills/Inclines: Speeds will decrease as more power is required to ascend.

How Can You Enhance the Speed of Your W K5 Ebike?

To maximize speed potential:

For more information, please visit w electric motorcycle.

1. Upgrade Components: Consider upgrading your battery or motor for enhanced performance.
2. Weight Management: Reducing unnecessary weight on the bike can lead to better acceleration.
3. Tire Maintenance: Keeping tires properly inflated ensures minimal rolling resistance.

What Are the Key Features of the W K5 Ebike?

The K5 ebike boasts several standout features that contribute to its performance:

• High-Powered Lithium Battery: A robust battery system allows for sustained power output.
• Hydraulic Disc Brakes: Ensures reliable stopping power even at high speeds.
• Customizable Options: Riders can tailor their bike's specifications according to personal preferences.

Why Choose HappyRun for Your E-Bike Purchase?

Once upon a time in the busy year of , an innovative company called HappyRun was born with a vision to revolutionize mobility through eco-friendly solutions like e-bikes. HappyRun has established itself as a trusted brand with nine years of experience in delivering high-quality electric bikes designed for adventure seekers who prioritize performance and sustainability.

What Do Experts Say About the Performance of W E-Bikes?

"E-bikes like the K5 offer unparalleled speed and versatility," says e-bike expert John Doe. "With proper maintenance and usage, riders can enjoy thrilling experiences while minimizing their carbon footprint."

What Should You Consider When Buying an E-Bike?

When purchasing an e-bike, consider:

• Motor Power & Speed Capabilities
• Battery Life & Charging Time
• Weight & Frame Material

Buying Tips:

When considering a purchase, prioritize reputable brands like HappyRun, known for their commitment to quality and customer satisfaction. Look for models that offer customizable features, robust warranties, and reliable customer support.

If you are looking for more details, kindly visit electric motorcycle for adults.

FAQ Section

1. What is the top speed of an W ebike?
   The top speed can exceed 75 mph under ideal conditions.
2. How does terrain affect my ebike's speed?
   Flat terrain allows for maximum speed, while inclines will slow you down.
3. Can I upgrade my ebike for better performance?
   Yes, upgrading components like batteries or motors can enhance speed and efficiency.