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    Bicycle Engine Installation Preview

    Matt T. gives you a brief overview of the installation of the 2-stroke engine kit.

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    How to Mix Oil & Gas for a 2 Stroke Motor

    We go over how to mix your oil & gas for a 2 stroke motor. The ratio of oil to gas is 1 oil to 16 gas for

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    Carburetor Tuning Guide

    Engine mechanic Jonny shows you how to turn your NT carburetor.

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    Electric Testing

    Engine mechanic Jonny shows you how to test your CDI and Magneto.

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    How To Adjust Your Clutch

    Jonny shows you how to adjust your clutch.

48cc Mega Motors Silver Bicycle Engine Kit- 2 Stroke Item# FH-MEK48

OUR PRICE: $143.96
List Price: $295.00

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Regular Price: $159.95

Special Price: $143.96


Gasoline operated products are NOT compliant with Environmental Protection Agency ( E.P.A. ) or California Air Resources Board (C.A.R.B) for the use on/off Public roads. Upon purchase, the buyer agrees to use products for racing (closed-course competition) only and NOT for on/off public roads.

The Mega Motors Silver 48cc bicycle engine kit is the smaller form of our best selling Mega Motors engine. This kit comes with every thing that you'll need to convert bicycle into a motorized bike. You will still be able to pedal the bike and ride like normal or start the engine by releasing the clutch lever. There's no rope pulling needed. You can stop or start the engine as you ride. Don't be fooled by other retailers, selling outdated, old generation engines! All of our engines feature the latest updates. We make certain that all of our manufactures abide by strict quality control assurance measures and use the highest quality material so that we can make certain that all of our customers get only the best! 

With these strict quality assurance measures, we are able to offer a industry leading 6 month warranty!

4-5 HP (horse power)

25 to 35 mph depending on the gear ratio and weight.

MPG 100-150 miles per gallon

Independent drive sprocket and chain does not interfere with your current drive chain and peddling

Product Dimensions

48cc engine kit is about 8.5" height 7" length 5" width. Kit fits on standard 25mm to 29mm frame tube. Larger frame size requires drilling into bike frame and use the universal face plate. Ensure proper fit by reviewing the minimum dimension requirements diagram on the right. 


Product Requirements

For installing this kit buyer may need some basic hardware skills, tools, and take around 2-3 hours to install and do some adjustments. Seller is not responsible for misuse or this kit or any warranty after installation.

CNS Carburetor upgrades will require extra matierial to fit flush around the manifold. This can be remedied by wrapping the manifold with electric tape or using PVC to fill in the gap between the carburetor port and the maifold. 


Industry Leading 6 Month Warranty against manufacture defects. We cannot warranty issues caused by user neglect or improper use of engine. 


Package Includes *(Products pictured may come in different colors but does not hinder performance.)

1. 2011 Flying Horse Silver 48cc 2-Stroke EPA Approved Engine

2. Low Profile Carburetor

3. Upgraded Hush Muffler (Color may vary depending on availability)

4. Clutch Cable

5. Drive Chain Idler

6. High Quality Main Bearings

7. 415 Bike Chain

8. Upgraded Chain Tension Guide with Bearing Wheel

9. Chain Guard

10. Spark Plug

11. CD Ignition Coil

12. Upgraded Alloy Push Clutch Lever (Extended Leverage)

13. Upgraded Twist Throttle and cable with matching grip

14. Bonus:

15. Black Teardrop Gas Tank (2L)

16. Fuel Line

17. Throttle Cable

18. Clutch Cable

19. Gasoline Tank Switch

20. Sprocket Clamp Assembly

21. Sprocket Clamp Bolts

22. Large Spring (Heat Shield Spring)

23. Extension Spring (Recoil Spring)

24. 44 Tooth Chrome Sprocket with 9 Holes

25. Magneto

26. Kill Switch

27. Bonus: Spark Plug Removal Tool

28. All the Needed Mounting Brackets, Gaskets, and Hardware

29. Complete Color Easy to Follow Installation Instructions

30. DVD Installation Guide ($20 Value)

31.Bonus: Standard Universal Mounting Bracket

Fits Most 26" Wheel Bikes (Mountain, Cruiser, Chopper, Road) with V-frame.

Disclaimer: Operating this motorized bicycle and bicycle engine kit involved some risk of serious bodily injury. Buyer accepts responsibility for any and all vehicle operation that may lead to personal injury, economic loss, social distress, other losses, costs and damages. Seller is not responsible for injuries and/or damages resulting from operating this motorized bicycle or bicycle engine kit. Upon purchase, the buyer agrees to use products for racing (closed-course competition) only and not for on/off public roads.



Waranty information

All of our bicycles come with a 60 day warranty on frame failure and 30 days warranty on parts against any manufacture defects. The manufacture will replace any defective parts within the warranty period. Damages caused by misuse, improper maintenance or neglect are not covered by the manufactures warranty.

All returns must be pre-approved by contacting our RMA Department through the contact us page. Please provide us with your order number, date of purchase and reason for return. Not providing the detailed information requested will delay the returns process. Returns must be made within 5 days of delivery and are subject to a 15% restocking fee. Item must be returned in new, resellable condition.

Once your request has been received, you will be contacted within 5 business days with instructions for sending back the item(s). You must re-package any item(s) being returned as it was delivered to you, with all components, materials and documentation. We will ship the replacement once we have received and processed the returned item(s). If you request for a refund, we will notify you via Email of your refund once we have received and processed the returned item(s). All refunds will be limited to and based on the current price of the item minus any restocking fees.

All shipping costs are non-refundable. Customers are responsible for return shipping back to BikeBerry.com

By initiating the RMA process customers agrees to all decisions by BikeBerry.com and all decisions are final. Please allow up to 2 billing cycles for your credit to be posted to your account.

The following are warranty limitations and exclusions for bicycle engine kit product(s):

* Hoses
* Lubricants
* Gaskets
* Spark plugs
* Standard wear and tear: plastic parts & components (color coordinated housing, brakes, brake handles, seats, chain and tires.
* Extreme riding, racing or competition
* Loss of time without vehicle
* Vandalism, fire or theft
* Crash or accident
* Unauthorized outside repair
* Warranty does not cover or reimburse any outside labor charges
* Warranty does not cover any towing or shipping charges to and from for any reason including but not limited to repair, return or exchanges
* Defective warranty part(s) are required to be returned for exchange or for new replacement part(s).

The buyer is responsible for returning the products at their own expense during warranty. The buyer will be responsible for properly packaging the product(s) and shipping product(s) back to our location.
The warranty is voided if:

* The product(s) is customized in any way other than manual.
* The product(s) is damaged due to natural causes.
* The product(s) is damaged due to an accident.
* The product(s) is vandalized or stolen.
* The product(s) does not get proper or periodic maintenance.
* The product(s) is used in a manner which it was not intended for.
* The product(s) is modified

Only parts will be covered under the manufactures defect warranty. It is the responsibility of the customer to determine which part is defective. Customer is responsible for repairs or installation of new exchange parts. Only defective parts will be exchanged.

Best Price Guarantee

BikeBerry.com is committed to providing our customers with the best price available online! At BikeBerry.com we work hard to offer the most competitive pricing available, but if you find a lower price online, let us know and we'll match it! In fact, if you find a lower price within 30 days of your original purchase date, we'll refund you the difference.

Complete the Best Price Guarantee form below to request a quote or price difference refund.

Best Price Guarantee Terms and Conditions:

Item must be the identical model from an authorized U.S. dealer. Specifically, the product must have the same U.S. manufacturer's warranty, model number, and contain the same components. BikeBerry.com will price match only in-stock products.

BikeBerry.com reserves the right to verify another online company's product availability and price before issuing a price match.

BikeBerry.com does not match auction websites or refurbished products.

The Best Price Guarantee does not apply to obvious pricing errors or clearance/close-out items.

Best Price Guarantee applies to the total purchase price of the item. Total purchase price includes shipping, taxes, or other discounts.

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Customers who bought this product also purchased

Customer Reviews

Awesome Review by Trusk1
Good (Posted on 11/6/14)
question Review by mandy
I have question... if you added a motor to your bike can you still use the pedals & not the motor.

**BikeBerry.com Response**
Yes! You can still pedal your bike freely even with an engine kit installed. (Posted on 8/23/13)
Awesome kit Review by Aaron
I bought this kit about a year ago and have put at least 2500 miles on it and the engine still runs great. Stock it did about 25. I replaced the plug with a NGK B5HS, way better than the stock one, and put an expansion chamber with a muffler on it and it does right around 32mph now! Great bang for the buck I would buy it again. (Posted on 5/6/13)
Is a very good motor. Review by Daniel
The motor is great and everything works. my only problem with it is that it doesn't come with everything you need. if you're gonna buy this kit buy a U-bolt mount and a better idler pulley. the factory idler pulley is very cheaply made and creates alot of problems. but other than that everything works great. (Posted on 9/14/12)
My Experience Review by Padre'
I have only been associated with these boys for a short while, but so far, they have bent over backwards to assist me when I needed help assimilating my first build...Also, they were very forcoming with information concerning the pineapple sprocket device, that I appreciate! Padre' (Posted on 4/17/12)
The engine sounds terrific. Review by Charley
The engine sounds terrific. I have a moped,(a PUCH), it sounds better and more powerful than my moped. It is geared much lower and therefore the engine has to be much more powerful than mine. It also seems to be very fast. Not sure I want to go that fast but nice to know I could. Also seems very smooth; Not too loud Nice Job. (Posted on 3/21/12)

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Customers Q & A

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Q: I am not able to order bicycle engines because I live in California yet you are out of Brea CA. Whats to prevent me from coming in to your shop and buying one there? Or am I also restricted from buying here in CA?

Posted On: 7/19/14 By: GEORGE CONTRERAS

A: That is a wonderful question that a lot of customer have for us, and we appreciate you contacting us here at BikeBerry.com! Unfortunately we legally are not allowed to sell motors to California residents, even if you wanted to pay cash we could not sell it to you. However for California residents, lets say you have a best friend or a family member in any other state i.e Nevada, Arizona, Washington, we can ship your 2-stroke to them and then once it is delivered it would be up to you on what you would want to do with the motor. Please feel free to let us know if you have any further questions or concerns, we work Monday-Friday 8:30am-5:00pm PST, at 1.800.317.0479.
Q: do you have a 48cc motor kit that runs on gas and not an oil mix?

Posted On: 2/12/14 By: martin

A: Yes, we do offer a 48cc engine kit that is not a 2-Stroke. That would be our 49cc Flying Horse 5G Pull Start Bicycle Engine Kit- 4 Stroke.
Q: I am curious if I would be able to mount this engine over the real wheel of my bicycle? If not is there an egine that comes with a rear mount option?

Posted On: 10/20/13 By: Russell Van Anda

A: Unfortunately due to the nature of how these engines work with the gravity drip gas tank and how the motor drives with the rear sprocket and engine's drive sprocket, mounting on the rear of the bike would not work. We currently are not carrying any rear mounted gas motors, we do have our Electric wheel motor kits, which do come as rear wheel options.
Q: Is there a difference between the 48cc Flying Horse and the 48cc Mega Motors engine kits? I haven't been able to find anything different in the description except the price. Thanks-

Posted On: 10/10/13 By: Paul

A: The difference is the manufacturer. The Flying Horse engine kits are manufactured by Flying Horse, and the Mega Motors engines by Mega Motors. We have found Flying Horse to be a far better build quality including better quality metal, higher performance hardware (bolts, nuts etc), and significantly increased longevity.
Q: I got my kit and i was mounting the motor and it looks like the frame of my bike is a little small. It is a 17 in frame with 26 in tires. What is the size of frame i should have for it

Posted On: 9/28/13 By: Sean

A: A majority of the bikes we carry that will work with our engine kits come with frames that are18-19".

Have a question? Call 800-317-0479
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