DDYOOK FS-781 Electric Bike Conversion Kit: Can It Turn Your Bike Into an E-Bike?

A powerful and affordable conversion kit with an impressive 1000W motor for under $200, but requires DIY installation skills and a separate battery purchase that significantly increases the total cost.

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Key Specifications

Weight
24.3 Pounds

Best For

How this e-bike scores for different riding styles

High Performance
75/100

The 1000W brushless motor with 28-34 mph top speed and dual-mode controller delivers strong performance for the price. Power-to-weight ratio is excellent at 41.2 W/lb for the kit itself.

Recreational Leisure
60/100

Once installed on a suitable bike, the 5-speed pedal assist and cruise control make for enjoyable casual rides. However, the DIY assembly requirement and missing battery reduce immediate recreational value.

Off-Road Adventure
55/100

The powerful 1000W motor and 264 lbs load capacity provide good off-road potential, but the absence of suspension and the requirement to build your own bike limits trail-ready capability out of the box.

Cargo & Utility
50/100

The 264 lbs maximum load capacity is below average for cargo applications, and without integrated racks or utility features, this conversion kit isn't optimized for hauling despite adequate motor power.

Daily Commuting
45/100

This is a conversion kit, not a complete bike, requiring significant DIY assembly. While the 1000W motor and LCD display are good, lack of battery (sold separately) and integrated lights makes it impractical for immediate commuting use.

Compact & Portable
20/100

As a conversion kit with 700C/29-inch wheels and non-foldable design, this offers zero portability advantages. It's designed to upgrade existing bikes, not provide compact storage solutions.

Our Verdict

The DDYOOK Electric Bike Conversion Kit is a budget-friendly way to turn your regular bike into an electric one, but you need to know what you're getting into. For just $190, you get a powerful 1000W motor that can push you up to 28-34 miles per hour, which is faster than most e-bikes that cost way more. The kit weighs only 24 pounds and has a nice LCD screen that shows your speed and battery life. You also get five different power settings and cruise control, which is great for saving energy on long rides. The aluminum parts are strong and won't rust, and the 2-year warranty gives you some peace of mind.

This kit works best for people who already have a good bike and want to make it electric without spending thousands of dollars. If you're handy with tools and don't mind doing the installation yourself, this could save you a lot of money. It's perfect for riders who want more power and speed for their daily rides or weekend adventures. The high-performance motor makes it great for people who live in hilly areas or want to go fast. Once you add a battery and get everything set up, you'll have a zippy e-bike that can keep up with traffic and make your rides a lot more fun.

However, this kit has some big downsides you need to think about. First, the battery isn't included, so you'll need to spend another $200-$400 to actually use it. That means your total cost could be $400-$600, not just $190. Second, you have to install everything yourself, which can be tricky if you've never worked on bikes before. There are no lights, no suspension, and no UL safety certification. The 264-pound weight limit is also pretty low, so bigger riders or anyone who carries heavy stuff should look at other options. If you want a complete bike that's ready to ride right away, or if you're not comfortable doing your own repairs and installation, you should probably buy a complete e-bike instead of this conversion kit.

What We Like

  • Really strong 1000W motor that can hit 28-34 mph, making it one of the most powerful conversion kits under $200
  • Super lightweight at only 24.3 pounds, so it won't make your bike too heavy when you add it on
  • The LCD screen shows everything you need like speed, battery level, and how far you've gone - really helpful for keeping track
  • Comes with a 2-year warranty which is pretty good protection for a budget conversion kit
  • Five different power levels plus cruise control means you can save battery or go fast depending on what you need

What Could Be Better

  • You have to buy the battery separately, which can cost $200-$400 more and makes this more expensive than it seems
  • This is just a kit so you need to install it yourself on your existing bike - not beginner friendly if you're not handy with tools
  • No lights included so you'll need to buy and install those separately if you want to ride at night safely
  • The 264 pound weight limit is lower than most e-bikes, so heavier riders or anyone carrying cargo might have problems
  • Not UL certified, which means it hasn't been tested by safety labs like more expensive e-bike systems

Standout Features

1000W Brushless Motor
Exceeds the 750W average for conversion kits and matches high-performance e-bikes costing $1000+
24.3 lb Kit Weight
40% lighter than average e-bike conversion kits, minimizing impact on bike handling
Dual-Mode Controller
Unique failsafe feature that switches to non-Hall mode if sensors fail, rare in budget kits

Full Specifications

Build & Frame

Wheel Size29 Inches

Weight & Capacity

Bike Weight24.3 Pounds

Features

Included Features

Cruise Control
LCD Display
Pedal Assist

Not Included

App Connectivity
Fat Tires
Fenders
Foldable
Integrated Lights
Rear Rack
Removable Battery
Suspension
Throttle
UL Certified
USB Charging
Walk Mode

Frequently Asked Questions

Common questions about Electric Bike Conversion Kit, 48V 1000W 700C 28"/29" Front/Rear Wheel Electric Bicycle Hub Kit Dual Mode Controller w/LCD Display & PAS, 5-Speed Adjustment E-Bike Conversion Kit

Does this kit come with a battery?

No, the battery is sold separately. You'll need to buy a 48V battery that works with this kit, which usually costs between $200 and $400 extra.

How fast can this conversion kit make my bike go?

The 1000W motor can reach speeds of 28 to 34 miles per hour, depending on your weight, the terrain, and battery voltage.

Is this hard to install on my bike?

You'll need basic bike mechanic skills and tools to install this kit. It involves replacing your front or rear wheel, mounting the controller, connecting wires, and installing the LCD display and pedal assist sensor.

What size bike wheels does this fit?

This kit works with 700C, 28-inch, or 29-inch wheels. Make sure your bike has one of these wheel sizes before buying.

How much weight can the motor handle?

The maximum load capacity is 264 pounds total, which includes your body weight plus anything you're carrying on the bike.

Scores

Overall Score 58/100
Value Score 85/100
Popularity 68/100

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Tags

budget conversion kit high power motor diy installation required battery not included best for speed lightweight kit requires technical skill

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