Nothing as cool as transforming your bicycle to a gas-powered motorbike! You get to enjoy more thrust, more speed and perform cool stunts with a bike. As cool as this is if you use a poor bicycle upgrade engine kit the experience can be frustrating. You want to purchase only the best 2 stroke bicycle engine kit. I mentioned a two-stroke bicycle engine because that’s the ideal engine type for a bicycle upgrade as we will see much better in the subsequent section.

When it comes to giving your bicycle a stunning upgrade to a motorized bike, there are two options for you to choose – the gas engine and the electric engine kit. However, you can choose from the comparison below, the gas engine kit and the electric engine kit both have their pros and cons; most popular is the gas engine kit which is also what you are here to discover.

Gas engine vs. Electric engine kit

Honestly, there are just two points of advantage an electric engine kit has over a gas engine. These advantages are reduced co2 emission and reduced maintenance cost.

Eco-Friendly & Maintenance

Environmentally, an electric bike engine kit is friendly. It doesn’t emit harmful gases or unwanted sound, unlike the motorized bike that produces lots of emissions, specifically gas bike engines with two-stroke piston movement; these guys produce lots of gas. Also, you don’t have to spend so much on buying engine oil, servicing motor engine, or buying gasoline.

Speed & Power

Putting these two conditions I mentioned above aside, a motorized bike is a go if you want speed, efficiency, more torque, and longer journeys with your bike. Electric engines can’t give you the speed a gas engine will typically give, except you are okay with spending a lot of cash on high-power electric engines.

Also, you can use a gas powered engine for your moving up a hill. Not all electric bike can conveniently do this. Your movement with an electric bike is limited to the number of hours that the battery pack can last. Therefore, you can’t travel far and note that there must be an electric source to charge around. A gas engine is more flexible for movement, you can go far with a full tank of gasoline, and if peradventure you run short on gas, you can always visit a nearby petrol station.

Rounding off this matter, note that a gas engine kit will give a more exciting experience to your bike compared to the electric engine kit. Also, the gas engine kit is more affordable compared to the electronic engine kit.

Gas Engine Kit Features

At this point, let’s talk in details on the features of a gas engine kit. One of the essential characteristics to note in choosing a gas engine kit for your bicycle is the number of strokes.

The number of strokes refers to the number of times the engine piston has to cycle to complete full fuel combustion. There are two types:

  • Two-stroke gas engine
  • Four-stroke gas engine

Therefore, two-stroke does complete fuel combustion in two piston cycle, while four-stroke does it’s own in four piston cycle. Which of these is best for your bicycle upgrade, two-stroke or four-stroke?

Let’s compare

Four-stroke Engine vs. Two-stroke Engine

Whichever of the engine you choose is left to the following factors: your preference, the average weight on the bike, and your application of the bike. I’ll simplify things from the last element i stated.

Application of the Bike:

if you’ll be using the bike for commuting and racing, a two-stroke engine is ideal for such application because of its faster speed. Even, a two-stroke engine runs optimum at rapid speed, and this is opposite to a four-stroke engine. A four-stroke engine is made for a slower rate, and the engine performs optimally at a slow pace.

Therefore, you choose! Will you be using your bike for fast motion movement you pick a two-stroke engine. If you’ll be using your bike for a slow application, a four-stroke engine is preferable.

The Average Weight on the Bike:

What’s the rider’s weight? Any extra load as you move? Answering these questions will guide your choice between both bike engine types. For a heavier weight, above 350 lbs, you should opt for the four-stroke engine. Otherwise, the two-stroke engine won’t do badly at all. The value of the cc (cubic centimeters) also plays a role; higher engine cc means more weight. However, for the figure I gave above, the 375 lbs limit is on 80cc for two-stroke engines.

If the average weight on the bike is more massive than 350 lbs, it’ll be difficult for a two-stroke engine to move you around. Otherwise, you can use a two-stroke bicycle kit  engine

Other Differences Between the Two Engine Variations:

Two-stroke requires you to mix the gasoline with a specific fraction of engine oil for optimal engine function. Four-stroke, on the other hand, requires an occasional addition of oil. Also, two-stroke engines have three moving parts, while a four-stroke has 11 moving parts.

However, this post is about two-stroke engine kits. So you know I am on the “two” side. 😉

I mentioned earlier about a particular engine value known as cc. I’ll like to expound a little because of its importance in guiding your choice on the best 2 stroke bicycle engine kit for your upgrade. The cc which means cubic centimeters and it’s a measure of engine cylinder’s volume or engine displacement. This value is directly proportional to the power output of the engine. The higher the cc, the more fuel and air available for combustion which consequently affects the power output.

So you seriously want to go for the higher cc.

Most of the engine capacities available or accessible in the market are the 49/50cc and the 66/80cc. Do you want to go for the 49/50cc or the 66/80cc?

49cc/50cc engine capacity vs. 66cc/80cc engine capacity

As I noted earlier, the engine capacity affects the overall power output of the engine. Therefore, 66/80cc translates to more power output for your motorized bike, meaning that you can drive uphill much faster and commute around with faster speed compared to the 49cc/50cc option.

I’ll go for the higher value, and I think you should too, except you want to save some buck or you’re on a budget, which is not a crime, right!?!

So let us see a detailed review of the top 3 of each engine capacity (49/50cc & 66/80cc), definitely two-strokes engine kit for this post.

Top 3 Best Two Stroke Bicycle Engine Kit 49cc/50cc

Below is a review of the top 3 two-stroke bicycle engine kit with an engine displacement of 49cc/50cc

Roadstar 2-stroke 50cc Engine Kit fits most 26″ or 28′ Wheeled Bikes with V-frame for Bicycle Mountain and Road Bike Gas Motorized Motor Bike

Roadstar 2-stroke 50cc engine kit

 

Specifications

  1. Engine Mode: Single Cylinder, Air-cooling, 2-stroke
  2. Bore & Stroke: 40mm x 38mm=48 cm3
  3. Rated Power: 1.15Kw/5000r/min (1.6 horsepower/5000r/min)
  4. Max. Power: 1.6Kw/6000r/min (3 horsepower/6000r/min)
  5. Ignition Mode: CDI
  6. Compression Ratio: 6:01
  7. Driving Ratio: 18:01
  8. Fuel Type: No.90
  9. Type of Sparking Plug: Z4C 14MM
  10. Volume of Oil Consumption: 1.5L/100km
  11. Type of Clutch: Friction Plate / Dry
  12. Cooling Mode: Natural Air Cooling
  13. Speed Limitation: 30km/hour
  14. Lubrication Oil: Oil for 2-stroke Petrol Engine (or Oil for 10W/40.10W/30)
  15. Mixing Ratio of Fuel and Engine Oil: 16:1 for new sets, 20: 1 after Running 500km
  16. Net Weight: 22.05 lbs / 10 kg
  17. Suitable for: 26″ or 28″ Bicycle

Product Highlights

  • It is best suited to upgrade the regular bike to a motorized bike. With it, you can enjoy riding at a speed as high as 30 km/hr.
  • It is designed to fit most 26or 28” wheeled bikes with V-frame.
  • Its engine possesses a single cylinder, air cooling, 2-stroke natural air cooling.

Pros

  • More value for less price.
  • Good power and value.

Cons

  • Poor instructions.
  • Lots of vibration.

 

PanelTech 48CC 49CC 50CC 2-Stroke Engine Gas Kit fits 26″ 28″ Motorized Mountain Bicycle Bike

PanelTech 48CC 49CC 50CC 2-Stroke Engine Gas Kit

 

A full kit includes the following: 2-stroke engine, carburetor, Ignition coil and CDI, throttle handlebar set, throttle cable, clutch cable, kill switch, clutch lever, chain, chain cover, sprocket with 9 hole clamp pads, chain tensioner, fuel tank, fuel filter, gasoline fuel line, and exhaust pipe.

Specifications

These are the important specifications:

  1. Mode of Engine Single cylinder air-cooling
  2. 2-stroke Bore & Stroke 40mm X 38mm=48 cm3
  3. Rated Power 1.15Kw/5000r/min (1.6 horsepower/5000r/min)
  4. Max. Power 1.6Kw/6000r/min (3 horsepower/6000r/min)
  5. Ignition Mode CDI
  6. Compression Ratio 6:01
  7. Driving Ratio 18:01
  8. Fuel type No.90 Lubrication Oil oil for 2-stroke petrol engine (or oil for 10W/40.10W/30)
  9. Mixing Ratio of Fuel and engine Oil: 16:1 for new sets, 20: 1 after running 500km
  10. Type of Sparking Plug Z4C 14MM Volume of oil Consumption 1.5L/100km
  11. Type of Clutch Friction Plate / Dry Cooling mode Natural air cooling Speed Limitation 30km/hour
  12. Net Weight: 10.5kg

Product Highlights

  • Designed to fit most 26” & 28” wheeled bikes (mountain, cruiser, chopper, road) with V-frame.
  • Top speed of 30000 miles per hour.
  • Offers 100-150 miles per gallon of fuel.

Pros

  • Great kit for a great price.
  • Good engine.

Cons

  • Carburetor needs more work.
  • Poor instructions.

 

JDMSPEED New Black 50cc 2 Stroke Cycle Motor Kit Motorized Bike Petrol Gas Bicycle Engine

JDMSPEED New Black 50cc 2 Stroke Cycle Motor Kit

 

Specifications

These are the important specifications as stated by the manufacturers:

  1. Mode of Engine: Single cylinder, air-cooling, 2-stroke
  2. Bore & Stroke: 40mm X 38mm=48 cm3
  3. Rated Power: 1.15Kw/5000r/min (1.6 horsepower/5000r/min)
  4. Max. Power: 1.6Kw/6000r/min (3 horsepower/6000r/min)
  5. Ignition Mode: CDI
  6. Compression Ratio: 6:01
  7. Driving Ratio: 18:01
  8. Fuel type: No.90
  9. Lubrication Oil: oil for 2-stroke petrol engine (or oil for 10W/40.10W/30)
  10. Mixing Ratio of Fuel and engine Oil: 16:1 for new sets, 20: 1 after running 500km
  11. Type of Sparking Plug: Z4C 14MM
  12. Volume of oil Consumption: 1.5L/100km
  13. Type of Clutch: Friction Plate / Dry
  14. Cooling mode: Natural air cooling
  15. Speed Limitation: 30km/hour
  16. Net Weight: 10.5kg

Product Highlights

  • Easily fits any bicycle.
  • Designed to fit most 26” & 28” wheeled bikes with V-frame.
  • Possesses a complete engine kit which includes 2 stroke air-cooled motor, 110 415 links, 2L oil tank, 19mm connect carburetor, etc.

Pros

  • Good customer service.
  • Legible instruction manual.
  • Does not vibrate.

Cons

  • Carburetor needs improvement.

 

Top 3 Best 2 Stroke Bicycle Engine Kit 66cc/80cc

Below is a review of the top 3 two-stroke bicycle engine kit with an engine displacement of 66cc/80cc

Seeutek 26″ or 28″ 80cc Bike Bicycle Motorized 2 Stroke Cycle Motor Engine Kit Set

Seeutek 26" or 28" 80cc Bike Bicycle Motorized 2 Stroke Cycle Motor Engine Kit Set

 

Specifications

These are the important specifications and constituents.

  1. 66/80cc 2­Stroke Engine Block
  2. NT Carburetor
  3. Exhaust Muffler
  4. Chain Guard
  5. Throttle Cable
  6. Clutch Cable
  7. Throttle Grip Assembly
  8. Killswitch
  9. Clutch Lever
  10. Chain Idler Pulley
  11. 415 HD Drive Chain
  12. Spark Plug
  13. CDI
  14. 1.5 or 2.5L Gas Tank
  15. Fuel Line
  16. Fuel Valve (Petcock)
  17. Sprocket Clamp Assembly
  18. 44T Drive Sprocket
  19. Heat Shield Spring
  20. Extension Clutch Spring
  21. Spark Plug Removal Tool

Product Highlights

  • Fits most 24” and larger bicycles with a V-frame and at least a 8.5” height clearance for the engine.
  • It has upgraded premium quality hex socket screw and bolts.

Pros

  • Good engine.
  • Great gas mileage.

Cons

  • Poor instructions.
  • Lots of vibration.

 

Iglobalbuy 80CC Petrol Gas Motor Bicycle Engine Complete Kit Motorized Bike 2-Stroke

Iglobalbuy 80CC Petrol Gas Motor Bicycle Engine Complete Kit Motorized Bike 2-Stroke

 

Specifications

These are the important specifications as stated by the manufacturers:

  1. Color: Black
  2. Engine Type: Single Cylinder, Natural Air-Cooling, 2-Stroke Gasoline Engine
  3. Max. Power: 2KW/5500r/Min
  4. Maximum Speed: 25 -38 mph
  5. Ignition Mode: Capacitor Discharge, Electronic Igniter
  6. Transmission Ratio: 16.4:1
  7. Compression Ratio: 7.8:1
  8. Type Of Sparking Plug: 4144
  9. Lubrication Oil: Stroke Engine Oil
  10. Oil Capacity:2L
  11. Fuel Consumption: 2.5L/100KM
  12. Type Of Clutch: Manual Dry Clutch
  13. Cooling Mode: Natural Air Cooling
  14. Net Weight: 10.92kg
  15. Package Included: 1X 80cc 2-Stroke Engine Motor Kit

Product Highlights

  • Suitable for most 26” wheeled bikes with V-frame.
  • Fuel mixture of 10:1 for new sets and 16:1 after running 500km.

Pros

  • Neatly packaged with easy to read instructions.
  • Great engine, works quite well.

Cons

  • Lots of vibration.

 

Goplus 80cc 2-Stroke Bicycle Gasoline Motorized Gas Engine Motor Kit

Goplus 80cc 2-Stroke Bicycle Gasoline Motorized Gas Engine Motor Kit

 

Specifications

These are the important specifications as stated by the manufacturers:

  1. Color: Black/Silver
  2. Engine Type: Single Cylinder,Air-Cooling,2-Stroke Gasoline Engine
  3. Max. Power: 2KW/5500r/Min
  4. Maximum Speed: 50 km/h
  5. Ignition Mode: Capacitor Discharge, Electronic Igniter
  6. Transmission Ratio: 16.4:1
  7. Compression Ratio: 7.8:1
  8. Type Of Sparking Plug: 4144
  9. Lubrication Oil: Stroke Engine Oil
  10. Oil Capacity:2L
  11. Fuel Consumption: 1.5L/100KM
  12. Type Of Clutch: Manual Dry Clutch
  13. Cooling Mode: Natural Air Cooling
  14. Net Weight: 22lbs
  15. Package Included: 1X 80cc 2-Stroke Engine Motor Kit

Product Highlights

  • Offers a speed of up to 50 km/hr.
  • Instructions contain every detail of assembly step.

Pros

  • Easy to install.
  • Runs great with speed up to 50 km/hr

Cons

  • Lots of vibrations.

 

A Comparison Chart of The Reviewed Bike Engine Kits

ModelImageMaximum SpeedMaximum PowerIgnition ModeType of Spark PlugNet Weight
Roadstar 2-stroke 50cc engine kitRoadstar 2-stroke 50cc engine kit30 km/hr1.6kWCDIz4c 14mm24.7 pounds
PanelTech 48CC / 49CC / 50CC 2-Stroke Engine Gas KitPanelTech 48CC 49CC 50CC 2-Stroke Engine Gas Kit30 km/hr1.6kWCDIz4c 14mm23.2 pounds
JDMSPEED New Black 50cc 2 Stroke Cycle Motor KitJDMSPEED New Black 50cc 2 Stroke Cycle Motor Kit30 km/hr1.6kWCDIz4c 14mm23.6 pounds
Seeutek 80cc Bicycle Motorized 2 Stroke Engine KitSeeutek 26" or 28" 80cc Bike Bicycle Motorized 2 Stroke Cycle Motor Engine Kit Set40-50 km/hr2.2kWCDIz4c 14mm22.9 pounds
Iglobalbuy 80CC Petrol Gas Motor Bicycle Engine KitIglobalbuy 80CC Petrol Gas Motor Bicycle Engine Complete Kit Motorized Bike 2-Stroke50 km/hr2kWCDIz4c 14mm24.2 pounds
Goplus 80cc 2-Stroke Bicycle Gas Engine Motor KitGoplus 80cc 2-Stroke Bicycle Gasoline Motorized Gas Engine Motor Kit50km/hr2kWCDI414422lbs

Final Verdict

Choosing the best 2 stroke bicycle engine kit for your upgrade and replacement relies on the factors I’ve pointed out in this review. Check your requirements against any of these top rated 2 stroke bicycle engine and decide.

Finally, if assembling the kit is a challenging task, you can watch YouTube videos made available by the manufacturers. Find them on YouTube by simply typing the name of the engine kit used above.

Cheers!

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