Performance

7 Best 4-Stroke Bicycle Engine Kits – 2021

About 4-stroke bicycle engine kits

Motorized bicycles are becoming a trendy means of transportation. Not only are they very functional and cost-saving, but maybe even more important, they are enjoyable to ride.

With a gas bike motor, you can arrive at your destination sooner, full of energy and sweat-free using, and all for only pennies in fuel costs.

Although most 4-stroke bicycle engine kits use similar technology, there are still many quality and price variations. We cover the best 4-stroke bicycle engine kit brands on the market, including Anbull, MOTOOS, Seeutek, HOTSTORE, GDAE10, Lfhelper, DONNGYZ, and KABOCHO. These bicycle engine kits come with everything needed for a complete motorized bicycle. In addition, they work on most men’s and women’s bike styles. Let’s take a look at each bike kit.

Top 7 Best 4-Stroke Bicycle Engine Kit Reviewed.

1. Anbull 49CC 4-Stroke Gas Petrol Motorized Bike Bicycle Engine Motor Kit for 28” V Frame Bike and 26” ATV

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Over the years, Anbull has earned a reputation for making some of the highest quality 49cc 4-stroke bicycle engine kits on the market. Anbull 49CC 4-Stroke Gas Petrol Motorized Bike Bicycle Engine Motor Kit for V Frame Bike and 26″ bikes with a top tube frame. With a powerful motor and 44 tooth 9 hole sprocket, this setup results in a speed of 27-32 MPH / or 43-51 KPH. Has a 41.8 x 36 mm bore stroke and 49 cm3 displacement. See more on Amazon…

2. MOTOOS 49CC 4-Stroke Motorized Cycle Petrol Gas Engine Motor Kit Fit for Normal 28″ V Frame Bike and 26″ ATV Bike Bicycle Full Set

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This 49cc 4-stroke pull-start gas engine conversion kit fits a standard 28 V frame bike or 26 standard bikes. With a powerful motor and 44 tooth 9 hole sprocket, this motor runs 27-32 MPH / or 43-51 KPH. MOTOOS is an underrated 4-stroke bicycle engine kit not experiencing the same attention as its competitors. It’s everything you need at a price that can’t be beaten.See more on Amazon…

 

3. HOTSTORE 4-Stroke Bicycle Engine Kit 49CC Engine Motorized Bike Kit Gas Motor Pull Start Conversion Kit Air Cooling Motorized Engine Bike Motor Kit

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HOTSTORE is well known among the bike owners community. A powerful 4-Stroke Single Cylinder Engine With Air-Cooling. The 49CC Engine Motorized Bike Kit is suitable for Mini Pocket Pit Dirt Bike Gas Chopper G-Scooter ATV Quad Bicycle modified pedal go-kart. Even if for cruising only on the weekends. The HOTST is definitely a sound investment.See more on Amazon…

4. 49CC Motorized Bicycle Kit Bike Engine Kit Single Cylinder 4-Stroke Gas Petrol Motorized Bike Engine Scooter Belt Gear

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GDAE10’s 49cc 4-stroke pull-start gas conversion kit with a 29cm crank sprocket is ideal for bikes with 26-inch frames. The tank holds 2 liters of gas, and everything comes with the kit. Has a top speed of between 27 – 32 MPH / or 43 – 51 KPH. The kit comes with a throttle with a built-in kill switch and throttle cable. Comes with all the kit needed for a 26-inch bike. It is powered by a single-cylinder, air-cooled, 4-Stroke, OHV single-cylinder engine with a Bore x Stroke (41.8 x 36 mm) and a compression ratio of 8.0:1. Net Horse Power Output: 1.6kW (2.1HP) at 7,000 rpm; Net Torque 2.7 Nm ( 2.0 lb-ft) at 4,500 rpm; PTO Shaft Rotation Counterclockwise (from PTO shaft side) The GDAE10 4-stroke bicycle engine kit can run with the big boys.See more on Amazon…

5. Lfhelper 49CC 4-Stroke Bicycle Engine Kit Gas Petrol Motorized Bike Motor Kit Model 142F Air-Cooled OHV Single Cylinder

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Lfhelper’s 49cc 4-stroke gasoline conversion kit for adult bikes. Ideal for 26″ frames and other bikes. The top speed is 27-32 MPH/ or 43-51 KPH. The tank holds 2 liters of gas, and everything comes with the kit; Engine model 142F.See more on Amazon…

6. DONNGYZ 49CC Motorized Bicycle Kit Bike Engine Kit Single Cylinder 4-Stroke Gas Petrol Motorized Bike Engine Scooter Belt Gear(US Stock)

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This is also a 49cc 4-stroke pull-start petrol conversion kit for adult bicycles—ideal for bikes with 26-inch frames and similar. Long-term spares are available as required. The tank holds 2 liters of petrol, and everything comes with the kit. The top speed of between 27 – 32 MPH / or 43 – 51 KPH. The price was right for the workmanship and value for money.See more on Amazon…

7. KABOCHO 4-Stroke 49cc Petrol Gas Motor Bicycle Engine Complete Kit Motorized Bike

…click image to see more on Amazon
The 49cc 4-stroke fuel conversion kit fits 28 V-frame bikes and 26 ATV bikes. With a powerful engine and a 44-tooth 9-hole sprocket, this engine has a speed of 27-32 MPH / or 43-51 KPH. The 49cc 4-stroke engine kit is perfect for cruising around town.See more on Amazon…

 

There are immense benefits to choosing a 4-stroke engine over a 2-stroke engine.

Buying a 4-Stroke Engine over a 2-Stroke means:

  • More HP – Higher torque at lower RPMs.
  • No need to mix oil with fuel – Less pollution and more convenient.
  • Longer Life – Four-stroke engines tend to last longer, run cooler, and safely run for more extended periods.
  • Quieter – 4-stroke engines make less noise than 2-stroke engines.

Fuel Costs for a 4-stroke bike

Consider a 4-cycle engine that can get far more than 100 miles per gallon. Now, let’s figure a hypothetical example. Let’s say fuel gets expensive, up to $3.00 a gallon, and you’re only getting the low end of 100 miles per gallon. So you’re looking at a low fuel cost of .03 per mile.

Most bike fuel tanks are 2-liters. Converting that to gallons, it’s approx .26 gallons or very close to a quarter gallon of fuel capacity. So having a full 2-liter gas tank works out to be over 25 miles of travel between refuels.

Not too bad, considering that some 4-stroke bike motor kits are capable of 35 MPH, your bike could go as fast as a small moped or scooter and keep up with traffic on many residential roads for pennies a mile. Well worth the engine’s cost, a cheap road or mountain bike, and a few hours of installation, in my opinion.

 

FAQs

What is the difference between a 2-stroke and a 4-stroke?

2- Stroke Engine

4-Stroke Engine

A four-stroke engine means the pistons make four strokes (or two revolutions of the crankshaft) to complete a full intake cycle, compression (with ignition), output, and exhaust strokes.