Top 5 Bicycle Engine Kits
Custom black 2-stroke engine installed on stretch cruiser. Photo: BikeBerry (Facebook)
If you search “bicycle engine kit” online, you’ll be overwhelmed with more bike motors than you know what to do with. You’ll see 2-stroke engines and 4-stroke engines; chain drive, belt drive, and friction drive engines; center-mounted engines and axle-driven engines. It’s far too much work to go through every bike engine option, and it’ll take you a very long time to sift through all the reviews out there. That’s where we come in. We’ve narrowed it down to the 5 best motorized bike engine kits on the market. That way you can spend less time doing the legwork online and more time riding and enjoying your very own motorized bicycle. We’ll get to the top 5 motorized bicycle engines in a little bit, though. First, let’s talk about what a bike engine kit is and why you should install one on your bicycle.

What Is a Motorized Bicycle Engine Kit?

Black and silver customized 2-stroke engine installed on bicycle. Photo: BikeBerry (Facebook)
In simplest terms, a motorized bicycle engine kit is a motor that you install on your bicycle. By motorizing your bicycle with either a 2-stroke or 4-stroke engine, you essentially turn it into a gas-powered vehicle. Unless you’re going for an engine-only rig, a motorized bike engine kit typically includes mounting hardware, throttle and kill switch components, a drive sprocket, and other small parts. Note: Depending on your state and local laws, riding a motorized bicycle may or may not require a license and registration. Be sure to read up on your state’s motorized bike laws for more information. Typically, you’ll see 2-stroke and 4-stroke motorized bike engines. There are a few differences to take note of, so make sure you know exactly what you want out of your motorized bicycle.

2-Stroke Engine vs. 4-Stroke Engine

66/80cc engine vs. 49cc engine. Both 2-stroke and 4-stroke engines are made to turn your bicycle into a motorized bike. That said, there are some advantages and disadvantages to both options that you should keep in mind. If you’re looking for a customizable ride that can hit high speeds, a 2-stroke engine is a great choice. Though you can only ride a 2-stroke motorized bike for 30 minutes before you need to cool it down, it can potentially reach top speeds of 40 MPH. This is thanks to the amount of high-performance 2-stroke engine parts that are available including high-performance carburetors, upgraded cylinder heads, and boost bottles. With these 2-stroke upgrades, you’ll see an added boost in speed and torque. On the flipside, though a 4-stroke engine can only reach max speeds of about 30 MPH, it can withstand longer rides up to one hour. There aren’t many upgrades for 4-stroke engines, either, but even then, these engine kits are typically more durable and longer-lasting, and they require less replacement parts over time. Ultimately, it all depends on what you’re looking for as a motorized bicycle rider. Do you want fast speeds and a lot of customization options? If so, you should go with a 2-stroke engine. If, however, you value longer rides and less maintenance, a 4-stroke engine is the more ideal choice.

Why Install an Engine on a Bicycle?

Customized red 2-stroke engine on bicycle. Photo: BikeBerry (Facebook)
The main reason folks put together a motorized bicycle is for commuting. These bikes are great for getting from point A to point B and back. That said, there are plenty of other reasons to build a motorized bike. Traveling to work or school aside, motorized bikes are great for running quick errands such as going to the grocery store. These engines are also more eco-friendly than cars thanks to their lower gas emissions. Of course, there are more leisurely reasons to use a motorized bike, too. With the right high-performance upgrades, you could put together a powerful, fast-paced ride for racing and off-roading. Whether it’s for practical purposes or because you’re looking for a new hobby, a motorized bicycle is a great investment.

Top 5 Motorized Bicycle Engine Kits

If you’re trying to decide what the best motorized bicycle engine kit is, well, that all depends on your riding goals. Whether you just need a new ride for work or want a high-performance bike to hit the racing circuit, we’ve got you covered. Here are the top 5 motorized bike engine kits of 2020.

1. Editor’s Choice: BBR Tuning Racing Series Stage 4 66/80cc 2-Stroke Engine Kit

BBR Tuning Racing Series Stage 4 66/80cc 2-Stroke Engine KitThe BBR Tuning Racing Series Stage 4 66/80cc 2-Stroke Engine Kit is easily the most fully-equipped motorized bike engine around. This kit is loaded with the performance parts necessary to reach high speeds with ease. Though this 2-stroke engine kit includes the stock parts you’ll find in a regular kit, it also comes with a high-performance carburetor for greater speed, high-performance cylinder head for better torque, and expansion chamber for a smoother ride. This kit even includes a Stage 1 CDI so you can get a stronger spark. With all of these bonuses, the Stage 4 Racing Series 2-stroke engine will ensure you get a lot of power and performance out of your motorized bicycle. On top of that, it still allows for further customization, so the sky’s truly the limit with this engine kit. As far as 2-stroke motorized bike engines go, it really can’t be beat. 2-Stoke Engine Specs
  • Top speed: 40 MPH
  • RPM: 11,000
  • Horsepower: 2.75+
  • Engine color: Silver

Our Price: $259.95 | Click Here to Buy This 2-Stroke Engine Kit

2. Longest-Lasting: 49cc BBR Tuning 5G Pull Start Bicycle Engine Kit 4 Stroke

49cc BBR Tuning 5G Pull Start Bicycle Engine Kit- 4 StrokeIf you favor reliability over speed, the 49cc BBR Tuning 5G Pull Start Bicycle Engine Kit 4-Stroke is hands-down the most durable option. This 4-stroke kit is perfect if you’ve got a long commute ahead of you. Even though it won’t have you zipping through traffic like a 2-stroke motorized bike, this 49cc engine is no slouch. It’s fully capable of reaching speeds of up to 25 MPH with no problem. In addition, this 4-stroke engine kit is built with top-notch parts, so you won’t have to worry about long-term maintenance for a while. It’s a little pricier than most 2-stroke engine kits, but you get what you pay for: longevity, durability, reliability, and peace of mind. 4-Stoke Engine Specs
  • Top speed: 25 MPH
  • RPM: 8,500
  • Horsepower: 2.5
  • Engine color: Black

Our Price: $299.95 | Click Here to Buy This 4-Stroke Engine Kit

3. Easiest Installation: BBR Tuning 38cc Lock-N-Load Friction Drive Bicycle Engine Kit- 4-Stroke

BBR Tuning 38cc Lock-N-Load Friction Drive Bicycle Engine Kit- 4-StrokeOne of the biggest selling points of the BBR Tuning 38cc Lock-N-Load Friction Drive Bicycle Engine Kit- 4-Stroke is how easy it is to install. Unlike other motors, this 4-stroke engine isn’t mounted to your bicycle’s frame. Instead, the engine is mounted over the rear wheel of your bike. All you have to do is mount the friction drive assembly with a few bolts, install the engine and throttle/kill switch, fuel up, and you’re ready to ride. With this friction drive 4-stroke engine, you’re not limited to just men’s bicycles or 26-inch frames. It’s totally possible to install this engine kit on women's bikes, 20-inch bicycles, and even lowrider bicycles. Friction drive engines aren’t the fastest out there (topping out at around 15 MPH), but the ease of installation ensures you’re ready to ride within minutes. 4-Stoke Engine Specs
  • Top speed: 15 MPH
  • RPM: 6,500
  • Horsepower: 1.5
  • Engine color: Black

Our Price: $229.95 | Click Here to Buy This 4-Stroke Engine Kit

4. Best Features: 66/80cc BBR Tuning Bullet Train Electric Start Engine Kit

66/80cc BBR Tuning Bullet Train Electric Start Engine KitIt may not lend itself to much customization, but the 66/80cc BBR Tuning Bullet Train Electric Start Engine Kit still offers some truly unique features. Typically, you’d start a 2-stroke engine by pedaling and engaging the clutch. With the Bullet Train Electric Start Engine, though, you’ve got a dual-start component that eliminates the tedious nature of engaging and disengaging the engine. You can start the Bullet Train 2-stroke engine by utilizing its electric start component with the press of a button. Alternatively, you can use the pull start on the side of the engine to power the centrifugal clutch. No more engaging the clutch to start your engine or keep it running — just hit the button or pull the rope and you’re ready to ride in seconds. Furthermore, while there aren’t a lot of upgrades available for the Bullet Train 2-stroke engine, you can still modify it with a 2-Stroke Speed Carburetor or 66/80cc High-Performance Carburetor. Not to mention, the Bullet Train already offers a nice boost in power right out of the box. What you get with this kit is a 2-stroke engine that combines power and functionality. 2-Stoke Engine Specs
  • Top speed: 35 MPH
  • RPM: 10,000
  • Horsepower: 2.75
  • Engine color: Silver

Our Price: $279.95 | Click Here to Buy This 2-Stroke Engine Kit

5. Best Budget-Priced Engine: 66/80cc Mega Motors Silver Bicycle Engine Kit 2 Stroke

66/80cc Mega Motors Silver Bicycle Engine Kit- 2 StrokeMaybe you don’t need all the extras of the Stage 4 Racing Series engine or the electric start capabilities of the Bullet Train. If you’re just looking for a good engine that’ll get you up and running, the 66/80cc Mega Motors Silver Bicycle Engine Kit 2-Stroke is a fine choice, and it’ll save you some money right out of the gate. Though the Mega Motors 2-stroke engine may appear to be fairly simple, it can still be upgraded with high-performance parts. So if you eventually want to install a performance expansion chamber, carb, magneto, or CDI, you certainly can. 2-Stoke Engine Specs
  • Top speed: 30 to 35 MPH
  • RPM: 7,000
  • Horsepower: 2.75
  • Engine color: Silver, black

Our Price: $179.00 | Click Here to Buy This 2-Stroke Engine Kit

Honorable Mention: BBR Tuning Dragon Fire 66/80cc 2-Stroke Engine Kit

BBR Tuning Dragon Fire 66cc/80cc 2-Stroke Engine KitThe BBR Tuning Dragon Fire 66/80cc 2-Stroke Engine Kit is great if you’re looking for a cleaner, simpler installation than you’d get from other 2-stroke kits. This is due to the internal electrical components. Thanks to the integrated CDI and magneto magnet, you won’t have to deal with extra wires sticking out of your motorized bicycle. The cool thing about these internal electrical parts is that they’re upgrades from the stock components. Add to that the fact that you can still install other high-performance parts on this 2-stroke engine, and you’ve got a versatile motorized bicycle kit. 2-Stoke Engine Specs
  • Top speed: 35 MPH
  • RPM: 7,500
  • Horsepower: 2.75
  • Engine color: Silver, black

Our Price: $259.95 | Click Here to Buy This 2-Stroke Engine Kit

Finding the Right Motorized Bicycle Engine For You

66/80cc 2-stroke bicycle engine. Photo: BikeBerry (Facebook)
You can’t go wrong with any of the motorized bike engine kits listed here. There’s practically an engine kit for everyone, from bike racers to folks with long commutes. Whether you’re looking for fast speeds, a daily driver, or just some convenience, one of the bicycle engine kits in this article is sure to provide you with what you’re looking for. With all of your newly acquired knowledge, all you have left to do is pick the best 2-stroke or 4-stroke engine for your bike riding needs. Editor’s note: This post was originally published in October 2018. It has been updated for accuracy and comprehensiveness.
Category_motorized bicycles 101Category_product reviews and test lab

18 comments

BikeBerry

BikeBerry

“Hi Brian! Though it might be a bit tricky (at least at first), it’s definitely possible to install a motorized bike engine on a 20-inch bicycle.

For more information, check out our guide on how to motorize a lowrider bicycle: https://www.BikeBerry/blog/how-to-build-a-motorized-lowrider-bike/"

Brian watson

Brian watson

“I have a 20 inch Jessie James bicycle would any of. Your bicycle motors fit
My bike?”

BikeBerry

BikeBerry

“Hello,

Good question, the best way to determine if your bicycle will work with our engine kits would be to look at our video <a href=""https://youtu.be/NR8-IcrbwaI"" target=""_blank"" rel=""noopener noreferrer nofollow ugc"">here.

Best Regards,"

BikeBerry

BikeBerry

“Hello Tony,

All our bicycle engine kits are sold as DIY.

If you have any further questions please feel free to let us know.

Best Regards,"

BikeBerry

BikeBerry

“Hello Dean,

The<a href=""https://www.BikeBerry/66-80cc-bullet-train-electric-start-engine-kit-silver.html"" rel=""noopener noreferrer"" target=""_blank""> 66/80cc BBR Tuning Bullet Train Electric Start Engine Kit – Silver will go anywhere between 25-40 MPH depending on the gear ratio and the weight of the rider. If you have any further questions please feel free to let us know.

Best Regards,"

Terry Dyer

Terry Dyer

I would like to find someone close by me it has a bicycle that looks like a motorcycle but with a little bike motor already installed for sale

tony maloney

tony maloney

WHY don’t you sell the bike already put TOGETHER!

Beau

Beau

I have a huffy bremier. Will any of these fit

BikeBerry

BikeBerry

“Hey Clark!

The best way to determine if it is going to work our not is to check out our <a href=""https://www.youtube.com/watch?v=NR8-IcrbwaI&t=103s"" target=""_blank"" rel=""noopener noreferrer nofollow"">How to See if an Engine Kit Will Fit on Your Bike (2-Stroke & 4-Stroke) Video. This will determine if you have the right measurements to fit an engine kit on your bicycle."

BikeBerry

BikeBerry

“Hello Elise,

The unique thing about our kits is that they are sold as DIY kits and will require installation. Although, we would love to provide that for you we do not our best advice would be to take it to a local trusted mechanic for installation."

Dean

Dean

What’s the speed on #5

Glenn

Glenn

That helped a lot, now I just have to order what I want.

Marc Ransom

Marc Ransom

Great article! Thanks! I’m presently over hauling my cruiser to include a gas motor. I’m 64yrs old and just want to putt the 6 miles to my VFW Post . What would I expect to pay to have a pro installation ? I live in Lake Elsinore California. Thanks again for the great article

PapaVic

PapaVic

ThNk You for all this great information.

Don Rose

Don Rose

Interested

clark paetz

clark paetz

“Can I install any of these on a 20”" Schwinn
Stingray bike?"

Larry

Larry

just bought the bullet train electric kit and this one fires so I agree with one of the best kits out there.

Elise Vigil

Elise Vigil

How much to have installed.,,80 çc

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