Why Shop BikeBerry.com?Click Here

No Sales Tax! excludes CA
Product Videos
  • Play

    Bicycle Engine Installation Preview

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

  • Play

    Carburetor Tuning Guide

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

  • Play

    Electric Testing

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

  • Play

    How To Adjust Your Clutch

    Jonny shows you how to adjust your clutch.

66/80cc Mega Motors Silver Bicycle Engine Kit- 2 Stroke Item# FH-1AAEKJETS

OUR PRICE: $159.95
List Price: $299.00

* Required Fields


 Due to Regulations no California Residence Buyers. California Residence Please Check California Air Resource Board.

The Silver Mega Motors 66cc/80cc bicycle engine kit is the perfect for beginner builders and riders. Don’t be fooled by the super low price, though- our Mega Motors bicycle engine kits have the best parts for beginners in the industry! All of our engines feature the latest updates to the standard clutch ball bearings. 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! 

This kit comes with every thing that you'll need to convert bicycle into a motorized bike- all you need are some basic, household tools. 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! Don't be fooled by other retailers, selling outdated, non-EPA approved, old generation engines! Whether you're a beginner, or you need an engine that won't hurt your wallet, our Mega Motors 66cc Bicycle Engine Kit is perfect for your next motorized bike build!

*Note: Universal Mounting Hardware are not included with the engine kit. 

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

4-5 HP (horse power)

30-35 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

80cc 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. 

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.

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.


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


Package includes

1. Silver Mega Motors 80cc 2-Stroke EPA 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 Engine Drive 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

13. Upgraded Twist Throttle and Cable With Grip

14. Black Teardrop Gas Tank (1.5L)

15. Fuel Line

16. Throttle Cable

17. Clutch Cable

18. Gasoline Tank Switch

19. Sprocket Clamp Assembly

20. Sprocket Clamp Bolts

21. Large Spring (Heat Shield Spring)

22. Extension Spring (Recoil Spring)

23. 44 Tooth Chrome Sprocket with 9 Holes

24. Magneto

25. Kill Switch

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

27. Complete Easy to Follow Installation Instructions

28. Bonus: DVD Installation Guide ($20 Value)

29. Bonus: Standard Universal Mounting Bracket

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

Due to Regulations no California Residence Buyers. California Residence Please Check California Air Resource Board


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.


Disclosure of accurate engine size: While we have chosen to use the long standing factory branding engine size of "80cc", the true displacement of the bicycle engine is 66cc. Down through the years China bicycle engine manufactures have advertised their biggest engine as 80cc, therefore we have listed them in the same way on our website. However, the bore and stroke of an 80cc being 47x38mm equals 66cc. Therefore the true displacement of the 80cc bike motor is 66cc. In the west, the volume of a cylinder is calculated by using the formula Volume = Pi x Radius Squared x Stroke. However,in the east the displacement of an engine includes the area of the cylinder head's combustion chamber as well as the volume of the cylinder. As such, there lies a discrepancy between measuring standards by the manufactures in China with those in the United States. As such, all "80cc" engine kits on the market today are actually 66cc in displacement size if measuring by US standards. .




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.

  • * Required Fields

Customers who bought this product also purchased

Customer Reviews

5 Stars Review by Cale
The engine kit is mostly common sense. If you've ever put together a lego without the instructions then this engine kit is a breeze. I know nothing about any type of engines at all got the kit on in 4 hours. I have had the engine for a month it's my new daily driver. I have 2200 miles on it and am performing a few upgrades on it. Thanks BikeBerry! (Posted on 9/5/13)
Loads of fun, gets lots of praises and second looks ... Review by bongerts61
I am giving this an overall rate of 4 stars. Read my review ...
Received my package on time(5 stars on that). Dove into it right away, lined up the pieces and parts. I was missing the Universal U-bolt that I requested to come with the package so I had to run to the nearest parts store nearest me(3 stars on that). Installed everything, motor, plugs, exhaust, chains etc. So, with my not so limited mechanical and electrical ability, had it going after several tweeks and adjustments. Took me all of approximately a total of 18 to 20 man hours of work. (I worked on it on and off). The video instructions is quite helpful to those who have intermediate to advanced mechanical/electrical knowledge but to the regular Joe with limited know how, I think the video instructions needs to be edited and added more detailed explanations on the "how to" part. Written instruction is even more vague than the video(3 stars on that). Otherwise, with a few tweeks and adjustments all is well. My motorized bike project is still running and still being tweeked but I am having LOADS OF FUN, irregardless. If you have the time and patience then this is a fun project for you. It was for me !!! (and finally 5 stars on the fun part) (Posted on 6/28/13)
A fast & fun project! Review by cogdoc
Installed this kit for my brother-in-law and was reluctant to see it go. Install instructions were easy to follow even with coaster brake modifications. It started on the very 1st try. I put about 15 kilometers on it before I had to give it up. Now I want one. Wish you would include 49cc decals (2) to put on the engine sides to ease the deputy's concern about it being legal.
49cc is the legal limit in this state for mopeds & motorized bikes. Lights & rear view mirror are required. (Posted on 4/17/13)
Great motor Review by Ron
This a good strong motor, I don't hear alot of people talking about it on the forum but I couldn't be happier with the motor performance. I kept hearing everyone talking about changing the sparkplug to the NGK brand, so I bought one at Advance Auto however I also bought an Autolite 275 and my motor runs so muhis brand of ch better than the junk stock (although I did get about 600 miles on it before I switched). Go buy the Autolite 275 as soon as you can, trust me it is well worth the huge $2.35 I paid for it. I had to replace the clutch pads at about 1200 miles, I don't know if the pads got worn quickly because of their quality (ceramic) or because of the way I drove the bike for the first few hundred miles while I got used to riding it. (Posted on 11/12/12)
Thank you Bikeberry! Review by butch
Couldn't be happier. I got my kit with a quickness and
three hours later I had it together and running like a champ.Too bad I cant get my brother off it long enough for me to take a spin. (Posted on 9/19/12)
THANKS BikeBerry! Review by motorM4N
I just got mine and it was an easy build until i fell off and scrapped my ass cheeks. still very fun! (Posted on 9/19/12)
nice Review by carlos
really nice stuff (Posted on 9/18/12)
What size is the drive chain? Review by Friendly Lunatic
This was my first build and it was an easy Sunday project. The motor runs great but when I had to shorten the chain after a couple hundred miles I didn't get the master link reinstalled correctly (I blame the fading light). I need a new master link but don't know if it's a #410 or #415 chain. What size chain is included with this kit? (Posted on 8/21/12)
wow Review by big kyle
reaaly enjoy this things so damn fast
(Posted on 8/18/12)
Great buy! Review by Ezra Hawkins
This was my first build. everything went smoothly including post-build. Thanks. (Posted on 8/14/12)
engine ok but Review by joanne
we bought one of these engines and it runs good but the chain was put on like it was suppose to be but it came off and wrapped into the back spokes causing the bike to wreck and the motor is so hot it caused 3rd degree burns on my husbands leg it is a good motor but the thing really needs some kind of heat shield for your legs and could use a better chain that dont break so easy. but for what it is it is a good motor just be careful of burns it will burn even threw long pants (Posted on 8/12/12)
Great kit! Engine just needs a couple rides to get running then starts up everytime. Review by Ron
this was my first build and it went great. kit arrived 3 days after i ordered it. engine and everything run great after a few rides and adjustments. (Posted on 6/3/12)
bikeberry Review by victor
i love this thing i show off with it
(Posted on 5/31/12)
Amazing and cool Review by Bike Motor
I love this and want it bad (Posted on 4/23/12)
Really cool engine kit Review by Bloodrush
this was a good engine kit that gets me from a to b this is the one to get if you want to get a engine kit. (Posted on 4/9/12)
This is definitely the best engine Review by Jeromy Garcia
This is definitely the best engine that Grubee has ever made. Its the ONLY engine on the market that has the steel sleeve engine cylinder! It makes a HUGE difference; the engine will last twice as long. (Posted on 3/26/12)
Thanks bikeberry! Great kit. Review by John
Thanks bikeberry! Great kit. the police have been up my butt since i've been tearing up the roads. Everyone loves the kit. The biggest reacting i get is laughs! I think i might try the new 4 stroke engine next. (Posted on 3/21/12)
Thanks for the timely shipping and cool motor kit. Review by warren Bruen
Thanks for the timely shipping and cool motor kit.
this was a test and you passed.but it did take about 8 hours to install, the next one will go together quickeri will be ordering four of them. (Posted on 3/21/12)

Write Your Own Review

You're reviewing: 66/80cc Mega Motors Silver Bicycle Engine Kit- 2 Stroke

How do you rate this product? *

  1 star 2 stars 3 stars 4 stars 5 stars
Customers Q & A

Ask a Question
Don't see the answer you need?Ask a Product Expert! The answer will be emailed to you and then posted here.

Items 1 to 5 of 7 total

per page
  1. 1
  2. 2
Q: Can this kit be used on a 29" cruiser bike? Just purchased the bike for a Christmas gift and would to install the motor kit too.

Posted On: 10/29/13 By: Paula

A: Yes any of our engine kits including the 66/80cc Mega Motors Silver Bicycle Engine kit 2-stroke will work on most cruiser bikes. You still want to make sure the diameter of the bike frame is not larger then 1.5". If it has multiple speeds you want to make sure the gear shifter is able to move to the left handle bar or can be moved around to fit. Typically with larger bikes the issues that you come across will be needing extra links for the chain and extending the cables.
Q: Can I use this kit on a mountain bike? Or is it only suitable for a beach cruiser type of bike?

Posted On: 9/26/13 By: Emin

A: Our Bicycle Engine Kits fit most 26" beach cruiser bikes, but they also can work on bike of other styles and sizes. In order to ensure a smooth installation, make sure you bike matches the specifications shown in the diagram found on this page. The diagram can be found directly underneath the photo on the upper left part of the product description page. If your bike fits those specifications listed in the diagram, installation should be a breeze!
Q: I was wondering if you had any mounts that will fit a smaller bmx bike?

Posted On: 5/11/13 By: David Marquez

A: Generally the issue with BMX style bikes is not with the frame being too small. More commonly bicycle engine kits will not fit BMX bikes because there is not enough room for the engine inside the bike frame, and because the wheel is too small to mount a sprocket. Our engine kits are designed to work with 26" beach cruiser style bikes with frames between 1" and 1 1/2" in diameter.
Q: How fasr does the 66cc go?

Posted On: 4/11/13 By: josh

A: The average top speed will be around 35 mph.
Q: When I install the 66/80cc Mega Motors Silver Bicycle Engine Kit- 2 Stroke will I have to remove the original bike chain and replace it with the one in the kit? And if I install the kit on a bike that shifts gears will the kits chain shift gears? Thanks in advance!-Broderick

Posted On: 4/11/13 By: Broderick

A: This is a very good question! No, you do not have to remove the original bike chain. When installing your bicycle engine kit onto your bicycle, your engine will use the chain it came with that mounts to the engine rear sprocket. When installing your engine kit onto a bicycle that is multi-speed, you would still be able to use your multi-speed function when the engine is not in use.

Have a question? Call 800-317-0479
EPA Approved Products Only  SSL Secured  BizRate Customer Certified (GOLD) Site - BikeBerry.com Reviews at Bizrate

Please wait...

{{var product.name}} Added to Cart Continue shopping
View cart & checkout