Best Motorized Bicycle Kits for 2021

Thinking about upgrading your bike with a motorized bicycle kit for an easier commute and less painful hills? There are now hundreds of kits on the market that let you turn almost any ordinary bike into a motorized vehicle. Knowing which kit is right for you is the challenge.

Thinking about upgrading your bike with a motorized bicycle kit for an easier commute and less painful hills? There are now hundreds of kits on the market that let you turn almost any ordinary bike into a motorized vehicle. Knowing which kit is right for you is the challenge.

We have put together a list of the best motorized bike kits currently available based on the feedback of hundreds of users as well as professional reviews. A good kit should be relatively easy to install, reliable, appropriately priced, and have great customer support.

Best 2 Stroke 100cc Bike Engine Kit

71ZuTA aGL. AC SL1000 1

Anbull

100cc 2L Tank Full Set

Best 2 Stroke 80cc Bike Engine Kit

Image 6 stage 4

BBR Tuning

Flying Horse Racing Series Stage 4

Best 4 Stroke 49cc Bike Engine Kit

BBR Bike Beryy Motor Kit e1552993689648

BBR Tuning

BBR Tuning 5G

Best 4 Stroke 80cc Bike Engine Kit

bbr tuning 79cc 1 1 1

BBR Tuning

BBR Tuning The Beast

Image 6 stage 4

BBR Tuning

Flying Horse Racing Series Stage 4 80cc 2 Stroke

When you’re in need of an engine with some serious power, the BBR Tuning Stage 4 Performance Engine Kit is the engine kit for you. 


> 2.75+ HP (horsepower)
> 25 to 40 mph depending on the gear ratio and weight
> Fuel Economy: 100-125 miles per gallon

If you are looking for a smooth ride, then this is the engine for you. Outfitted with an Expansion Chamber that won’t restrict your motor from expelling all the exhaust that it creates, keeping the engine smooth. But don’t worry, this does not mean that you will be spewing smoke. The special banana shaped chamber circulates the air around the chamber, reducing air pollution

  • Price: $$
  • Engine: Two Stroke
  • Fuel: Gasoline
  • Fits on standard male frames with tubing 25mm to 29mm in diameter
  • 2.75 horsepower
  • 25 to 45 miles per hour
  • 100-150 miles per gallon

Recommended: BikeBerry 49cc BBR Tuning 5G Pull Start Bicycle Engine Kit – 4 Stroke (Click to see product)

BBR Bike Beryy Motor Kit e1552993689648

BBR Tuning

Flying Horse Racing Series (Stage 4) 49 cc 4 Stroke

The all new BBR Tuning 5G 4 stroke bike engine kit features a centrifugal clutch and pull start enhancements, with all of the latest features and upgraded components BBR Tuning has to offer.


> 2-3 HP (horse power)
> 20 to 25 mph depending on the gear ratio and weight.
> Fuel Economy: MPG 100-150 miles per gallon

Bike Berry is located in Brea, California and has been around since 2007. They are able to provide good quality kits at a low rate as they are a factory direct, large volume retailer. They have a highly-organised customer care team which both respond directly to customer enquiries, and produce great instructional YouTube videos.

The 49cc BBR Tuning 5G is Bike Berry’s four-stroke bicycle motor kit that you can pick up for between $300-$350, or on a monthly payment plan. The bike runs off petrol, and has a separate oil reservoir to keep the engine well lubricated. It also has a centrifugal clutch which means that there is no need to manually engage and disengage the engine.

The kit is relatively straightforward to install and can be done by someone with basic knowledge within 2-3 hours, but requires a 26-inch bike. The purchase comes with a 6-month limited warranty. Depending on weight and ratio it can reach about 25 miles per hour, and gets 100-150 miles per gallon.

  • Price: $$
  • Engine: Four Stroke
  • Fuel: Gasoline
  • Top Speed: 25 mph
  • Installation: basic, 2-3 hours
  • Compatible: 26-inch
  • Warranty: 6 months

Silver Slant 66cc/80cc 2 Stroke Motorized Bicycle Kits from Gas Bike (Click to see product)

silver slant 66cc 80cc

Gasbike

Silver Slant 80cc 2 Stroke 

The Silver Slant is an affordable product from Gas Bike, which is based in Encino, California.


> 2.75 HP (horse power)
> 25 to 35 mph depending on the gear ratio and weight.
> Fuel Economy: MPG 100 miles per gallon

The Silver Slant is an affordable product from Gas Bike, which is based in Encino, California. The business was established back in 2000 when the company’s entrepreneur, running a different e-commerce site, purchased an engine for his bike to make commuting to his merchandise warehouse easier. There was so much interest in his motorised bike that a new company was formed.

This is Gas Bike’s affordable two-stroke engine kit, which you can pick up for between $100-$150. In general, two stroke engines are twice as powerful as four stroke engines of the same size as they fire once every evolution, while a four stroke will fire only once every other evolution.

This kit is pretty easy to install, and someone with basic bike skills should be able to do it within 2-3 hours. It can be used on pretty much any men’s mike 24 inches or larger. Once installed, it needs a gasoline and oil mix to run, and has a 6-month limited warranty. Depending on weight and ratio it can reach about 40 miles per hour and 130 miles per tank.

  • Price: $
  • Engine: Two Stroke
  • Fuel: Gasoline and Oil Mix
  • Top Speed: 40 mph
  • Installation: basic, 2-3 hours
  • Compatible: 24-inch+
  • Warranty: 6 months

Knight Racer 8G 4 Stroke Motorized Bike kit from Gas Bike (Click to see product)

Another quality product from Gas Bike, the Knight Racer 8G is a four-stroke engine bike kit that's packed with a lot of power, thanks to its belt driven transmission. It will set you back $250-$300. This kit is a bit more complicated to install than the 2 stroke engine, but can installed within 3-4 hours. It can be installed on pretty much any men’s bike 24 inches or larger. The engine straight gas, so no need to mix with oil, and its blissfully quiet despite its high horsepower and torque. The purchase comes with a 6-month limited warranty. Depending on weight and ratio it can reach about 25 miles per hour

  • Price: $$
  • Engine: Four Stroke
  • Fuel: Gasoline
  • Top Speed: 25 mph
  • Installation: basic,3-4 hours
  • Compatible: 24-inch+
  • Warranty: 6 months

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ModWheel Complete Electric Bike Conversion Kit from Bike Berry (26 Inch 36v Front Wheel) (Click to see product)

Modwheel electric bike conversion kit

Another great product from Bike Berry, you can pick up this electric bike conversion kit for 26-inch bikes from between $500-$600, or on the company’s monthly payment scheme. The wheel comes pretty much ready to go, and conceals a 250 watt brushless electric motor which runs off a lithium battery which can be fully charged within 5 hours. This electric motor is a bit less powerful than the other engines on this list, and cruises at only about 10 miles per hour and can over about 25 miles on a single charge. It is relatively easy to install, requiring 2-3 hours, and comes with a 30-day warranty.

  • Price: $$$
  • Engine: Electric
  • Fuel: Lithium battery
  • Top Speed: 15 mph
  • Installation: basic, 2-3 hours
  • Compatible: 26-inch
  • Warranty: 30 days

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Red Ruby 66cc/80cc 2 Stroke Motorized Bicycle Kit from Bicycle Motor Works (Click to see product)

Red Ruby motorized bicycle kit

Based in Centre Valley, Pennsylvania, Bicycle Motor Works is an independently owned retailer that prioritises customer services, providing unlimited support to all their customers.

This model has the benefit of only requiring gas, and has a maximum speed of 40 miles per hour and gets 125-150 miles per gallon. Affordable at $100-$150, it is relatively straightforward to install and can be done by someone with a basic knowledge in 2-3 hours. It can be applied to pretty much any 24-inch bike and is especially good for bikes with wider tubes. It comes with a 6-month warranty.

  • Price: $
  • Engine: Two Stroke
  • Fuel: Gasoline
  • Top Speed: 40 mph
  • Installation: basic, 2-3 hours
  • Compatible: 24-inch+
  • Warranty: 6 months

Pretty much any of these engine kits are a worthwhile investment. When choosing you need to balance speed and range, with ease of use and reliability. An electric motor will be quieter and easier to control, but offers more limited speeds and a pretty short range. A gas motor gives more power, but is messier to install and maintain, but you can get speeds of up to 40 miles per hour.

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FAQs

49cc motorized bicycle top speed?

Usually around 25 mph.

66cc motorized bicycle top speed?

Usually between 35 to 40 mph.

80cc bike engine kit top speed?

Kits advertised as 80cc engine are in reality 66cc engines with top speed ranking between 35 to 40 mph.

Where can I buy a motorized bicycle?

Boneshaker.bike will soon start selling motorized bicycle kits.

5 comments

  1. Fastest 49cc engine

  2. Hi I want tombuy thecomplete kit for my bike – if Its easy for self installation i can pay straight away. one issue – my bike is a tricycle – is this a problem. really appreciate if you’d help me.
    Could you also let me know if you take paypal

  3. Clyde Arizabal

    hi im so much interested to buy a 4stroke motorized bike, and how much? Thanks if you can help me.

  4. clyde arizabal

    hi ,im interested to buy a 4 stroke motorized bike, can I order one pls..

  5. Richard Russell Tierney

    I have a stretch limo 26 in bicycle frame I’m interested in the 80cc motor but I would like a high-end motor a good quality in manufacturing do you have any information about high-end motors for the two stroke thank you

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