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66cc/80cc Flying Horse 2-Stroke Engine Kit Stage I Performance Package Item# FH-STGI2PP-80

SALE Price: $247.00
List Price: $515.95

66/80cc Flying Horse Stage I Performance Engine Kit

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

Hold on to your seats, everyone! The Flying Horse 66/80cc Stage I Performance Package is an incredible upgrade for the price! Our Stage 1 performance package includes an upgraded Expansion Chamber and a High Performance Carburetor for speed; a Boost Bottle, Sound Dampening Set, and a high performance 3-prong spark plug for smoother running and quicker response; and a Performance Spring Idler for optimal chain tension and a smooth ride. Trust us, with this Stage 1 performance package you’ll be ready turn your plain, pedal bike in to an unstoppable motorized machine!

But have no fear! If you’re not looking to race, you still get all the standard parts you'll need to convert your basic bicycle into a motorized bike. You’ll be able to ride like normal with the engine disengaged, and engage the engine by releasing the clutch lever. You can start the engine as you ride by pedaling the bike and releasing the clutch lever, and stop the engine with the kill switch included with the kit. All of our engines feature the latest upgrades and parts, including high quality Japanese ball bearings in the main crank. Don't be fooled by other retailers selling outdated, non-EPA approved, old generation engines that use cheap bushings that do not last! 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 each of our customers get only the best! 

On top of our strict quality assurance measures, we also back our engines with an industry leading 6 month warranty

Product Dimensions & Specifications

The Flying Horse 66/80cc engine kit is about 8.5" height 7" length 5" width. The bike engine kit fits on standard, male frames with tubing of 25mm to 29mm in diameter. Larger frame sizes require drilling into bike frame with a stationary bolt and use the universal face plate to mount the front of the engine. 

Power: 5-6 HP (horse power) stock

Top Speed: 40-45 MPH (miles per hour)*

Fuel Economy: 100-150 miles per gallon

The engine chain does not interfere with your current drive chain and peddling because it rides on the opposite side of the bike sprocket.

 *Note: Depending on rider weight and tuning, most customers have reported speeds upwards of +45mph. Operation of a motorized bike at such speeds must be handled with extreme caution.

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

Installation is a breeze! The rider only needs some basic hardware skills, tools, and around 2-3 hours for installation and fine tuning adjustments (Note: Seller is not responsible for misuse or this kit or any warranty after installation).

Fits Most 26" Wheeled Bikes (Mountain, Cruiser, Chopper, Road) with V-frame. The frame should have 9-11” of clearance between the bottom bracket and top bar, and the diameter of the frame tubes should be 25-29mm (around an 1”).


Package includes

1. 2011 Silver Flying Horse 66/80cc 2-Stroke EPA Certified Engine

2. Low Profile Carburetor

3. Upgraded Chrome Muffler

4. Complete Clutch Cable Assembly with Clutch Wire Clip

5. Drive Chain Idler Pulley

6. Top Quality Japanese 202 Main Bearings

7. 415 Bike Engine Drive Chain

8. Drive Chain Guard

9. 2-Stroke Spark Plug

10. Electron Ignition Coil (CDI)

11. Locking Alloy Clutch Lever

12. Upgraded Twist Throttle and Cable With Grip

13. Updated 2.5L Black Teardrop Gas Tank (approx. ¼ of a gallon)

14. Fuel Line

15. Throttle Cable

16. Gasoline Tank Switch

17. Sprocket Clamp Assembly

18.  44 Tooth Chrome Drive Sprocket with 9 Holes

19. Large Spring (Heat Shield Spring)

20. Extension Spring (Recoil Spring)

21. High Quality Bearings on Both Ends of Crank

22. Kill Switch

23. Magneto

24. Required Hardware and Gaskets

25. Complete Easy to Follow Installation

26. Bonus: Standard Universal Mounting Bracket Included


Stage I Performance Package Also Includes:

1. Expansion Chamber

2. A High Performance Carburetor (carburetor subject to availability)

3. JNM Sound Dampening Kit

4. 3-Prong High Performance Spark Plug

5. Performance Spring Idler

6. Single Boost Bottle Induction Kit



Disclaimer: Operating a motorized bicycle and/or bicycle engine kit carries a risk of serious bodily injury. The rider accepts responsibility for any and all vehicle operation that may lead to personal injury, economic loss, social distress, other losses, costs and damages. BikeBerry.com 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. Therein lies a discrepancy between measuring standards by the manufactures in China with those in the United States. However, 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.

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Customer Reviews

A great kit Review by jimbobjoe
Definitly the best engine kit on the market; I build and sell these things along with go-karts, minibikes and dirtbikes. This kit is the best one I have ever tried. DEFINITLY worth the extra $. The only thing wrong with the whole kit was the kill-switch. I bought a new one at my local auto parts store and the kit worked great.

(Posted on 10/18/12)

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Customers Q & A

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Q: Have. A 56mm old track bike willyour top. 2 or 4 stroke kitts work

Posted On: 6/8/13 By: Donald Warner

A: Hey there, Donald! If your track bike has 26" wheels, 11" of clearance from your cranks to the top tube, and the down tube, top tube, and seat tube on your frame are 1-1/2" in diameter you'll be able to mount an engine to that bike! If you have anything outside of those measurements (such as a bigger frame than needed) you'll need to make some modifications such as getting a bigger u-mount or drilling a t-mount in to your frame in order for the mounts to fit properly.
Q: Is the bike legal for street use.

Posted On: 4/26/13 By: George L. Beegle

A: Every state and locality has different laws concerning these bikes. Please contact your local DMV and/or Sheriffs Department and ask them about motor assisting your bicycle.

Have a question? Call 800-317-0479
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