Best Small Motors for Bicycles: Upgrade Your Ride With an Aftermarket Kit
Looking to add motorized power to a standard bicycle? These small bicycle engine kits and electric conversion kits are designed to convert a regular bike into a motor-assisted ride. This guide highlights five practical options for different rider needs—from budget-friendly 2-stroke kits to powerful electric conversions. Each entry explains who it’s best for, why it stands out, and a clear caution to consider before purchasing. Whether you want cruising power for commutes, hill-climbing capability, or a do-it-yourself electric upgrade, these picks help you choose confidently.
| Product | Best For | Key Benefit |
|---|---|---|
| JAYGOVAN 80cc Engine Kit | Budget-first hobbyists | Solid power with simple CDI start |
| CUBELLIN 100cc Engine Kit | Best range and durability | High fuel efficiency, strong mounts |
| FONSOLUM Electric Bike Kit | Clean, quiet electric conversion | Brushed controller, wide wheel fit |
| Mahugde 110cc Engine Kit | Versatile frame compatibility | Adjustable fit for many bicycles |
| eaizybuk 100CC Kit | All-in-one conversion | Large fuel tank, good load capacity |
JAYGOVAN 80cc Bicycle Engine Kit
The JAYGOVAN 80cc engine kit pairs a compact two-stroke engine with a CDI ignition system for quick starts via pedal press. It develops about 2.1 kW (2.58 hp) and reaches roughly 23.6 mph with efficient fuel use. The kit is best for riders seeking an economical, entry-level motor conversion that remains manageable for DIY installation.
Best for: Casual riders and hobbyists who want straightforward power without complex components. This kit suits riders who value an easier install and lower upfront cost.
Why chosen: It offers a balance of reliable power and simplicity. The two-stroke design keeps parts relatively lean, and the CDI helps with consistent starting.
Caution / limitation: Two-stroke engines generally require precise fuel management and maintenance; expect regular tuning to maintain performance.
CUBELLIN Upgraded 100cc Engine Kit
The CUBELLIN 100cc kit emphasizes durability with stronger mounting bolts and a robust engine body. It promises a higher top speed (up to 48 km/h) and excellent fuel efficiency (up to about 150 miles per gallon). With a 36-tooth setup and full kit contents, it’s designed to transform a standard bicycle into a capable motorized bike.
Best for: Riders who want higher top speed and strong mounting for long-term reliability, especially on tougher rides or longer commutes.
Why chosen: The upgraded mounting hardware and efficient engine design support stable operation and better longevity for daily use.
Caution / limitation: Higher power kits can demand sturdier frame alignment and more intricate installation; verify frame compatibility before purchase.
FONSOLUM Electric Bicycle Motor Kit
This 24V, 250W electric kit includes a controller, mounting plate, chain, and accessories, enabling a practical rear-wheel drive conversion for 16-28 inch wheels. The kit’s aluminum and iron build aims for durability and long service life, with broad compatibility for DIY projects beyond bikes.
Best for: Riders seeking a quiet, low-maintenance electric upgrade and a simple conversion process.
Why chosen: Wide wheel compatibility and a comprehensive accessory set reduce sourcing hassles while supporting straightforward installation.
Caution / limitation: Electrical systems require attention to wiring and controller settings; improper setup can affect performance or safety.
Mahugde Upgraded 110cc Engine Kit
The 110cc kit offers a robust motor that supports 26″ to 28″ bikes with adjustable fit to various frame styles. It emphasizes durability and reliable performance, with a claimed max speed around 6000 rpm for efficient commuting and riding fun.
Best for: Riders who want broad frame compatibility and a stronger motor for mixed terrains.
Why chosen: The kit’s design favors flexible installation across different bicycle geometries and riding styles.
Caution / limitation: More powerful setups may require careful frame reinforcement and precise alignment during installation.
eaizybuk 100CC 2 Stroke Bike Motor Kit
The eaizybuk 100CC kit comes with a 0.53-gallon fuel tank and a CDI ignition, offering strong acceleration and a notable load capacity of up to 440 lbs. It’s designed as a turnkey package to convert a bicycle into a motorized ride with all necessary components included.
Best for: Riders who want a complete, one-purchase conversion with decent range and payload capacity.
Why chosen: The included fuel tank and all-in-one kit simplify the buying process and support longer trips between refueling.
Caution / limitation: Ensure your bike frame and drivetrain can accommodate the extra weight and torque during operation.
Buying Guide
Key factors to evaluate when choosing a small motor for a bicycle include engine type, compatibility, ease of installation, weight, and maintenance needs. Below are practical questions to guide your decision.
What propulsion type should I choose: gas or electric?
Gas kits typically deliver more power and longer range per refueling but require ongoing maintenance and fuel logistics. Electric kits provide quieter operation and fewer emissions but depend on battery capacity and charging options. Choose based on location, noise tolerance, and preferred upkeep.
Will the kit fit my bicycle frame?
Check wheel size compatibility (26″–28″ commonly supported) and frame style. Some kits offer universal mounting or require additional brackets. Confirm the bolt pattern and mounting points to prevent fitment issues.
How important is top speed versus efficiency?
Higher displacement engines can deliver faster top speeds but may consume more fuel or require sturdier frames. If daily commuting is a priority, prioritize efficiency and smooth torque. If weekend rides with hills are common, a more powerful kit may be worth it.
What about safety and durability?
Look for kits with robust mounting hardware and durable engine blocks or casings. A strong frame integration reduces vibrations and wear. Consider load capacity and braking compatibility when planning upgrades.
What maintenance should I expect?
Gas engines require carburetor tuning, fuel management, and regular oil/fuel mix checks. Electric kits need battery upkeep, controller checks, and motor temperature monitoring. Plan for routine inspection after installation.
Which kit offers the best overall value?
Value often comes from a balance of performance, durability, and included components. Kits with stronger mounting hardware, larger fuel capacity, and comprehensive accessory sets tend to save time and reduce aftermarket purchases.
What is a practical installation timeline?
Simple 80–100cc kits may install within a day for a mechanically proficient rider. Larger or more complex setups, like 110cc kits or electric conversions with multiple components, can take longer and may require frame adjustments or professional help.
FAQ
- Can I ride a motorized bicycle legally on public roads? Regulations vary by location. Check local rules before riding a motorized bicycle on streets or bike lanes.
- Do these kits require a professional installation? Many can be installed by DIY enthusiasts, but some setups benefit from professional alignment and safety checks.
- Will a bigger engine damage my bicycle? If the frame and mounts are compatible and installation is proper, the frame should handle the added torque. Always verify load and torque ratings.
- How do I choose between a 2-stroke and 4-stroke kit? 2-stroke kits tend to be lighter and simpler but require more frequent maintenance and fuel mixing. 4-stroke options offer cleaner operation and steadier power but may be heavier and more complex.
- What maintenance schedule is typical? Gas kits require regular fuel and oil checks; electric kits require battery/charger maintenance and controller inspections. Follow manufacturer guidelines for intervals.
- Are these kits covered by warranties? Warranties vary by product and seller. Review the warranty details on the product page and ensure coverage aligns with your usage.