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    48cc 4-Stroke Installation

    Engine specialist Jonny shows you how easy it is to install your new 4-stroke bicycle engine kit!

49cc BBR Tuning 5G Pull Start Bicycle Engine Kit- 4 Stroke Item# FH-5G-4STROKE

OUR PRICE: $329.95
List Price: $799.95

Availability: In stock

From: $329.95

To: $410.84

Price as configured: $329.95


BBR Tuning 5G 4-Stroke Bicycle Engine Kit

Ready for a ride that will last? If you’re looking for a tough, reliable, long-lasting bicycle engine kit look no further than our BBR Tuning 5G 4 stroke engine! The all new BBR Tuning 5G 4 stroke bike engine kit features a centrifugal clutch and pull start enhancements,  with all of the latest features and upgraded components BBR Tuning has to offer. This  4 stroke bike engine kit is truly the cream of the bike kit crop. Forget premixing oil and fuel! Instead, this engine features an independent oil reservoir which keeps the engine well lubricated. This is the reason the 4 stroke engines are known for their reliability and long life. Moreover, with the centrifugal clutch feature, there is no need to engage and disengage the engine manually. Similar to an engine for a scooter or goped, you simply pull the starter chord and hit the throttle to go! When the bike is stopped, the engine will automatically disengage so that the engine will stay running. This kit is perfect for those that are looking for the added reliability and ease of use of a 4 stroke engine with an automatic transmission.


This kit comes with all the components you'll need to convert a compatible bicycle into a motorized bicycle. Startup is a breeze and you can stop the engine with a simple killswitch provided with the throttle assembly. Don't be fooled by other retailers, selling outdated, non-EPA approved, old generation bicycle engine kits! All of the Flying Horse engines feature the latest updates, including high quality needle bearings and Japanese ball bearings. Older generation engines use cheap bushings that do not last! BikeBerry.com takes extra measures to ensure 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! 

 ** Please note: Sprocket Clamp Assemblies included with BBR Tuning 2-Stroke 48cc and 66/80cc, and 4-Stroke 49cc bike engine kits come with only 1x set of metal plates. Older production of these assemblies included 2x sets, but from testing and redesigning, existing engine kits and engine kits in the future will only require 1x set. This redesigned assembly helps secure your rear wheel sprocket better than in previous production. NOTE: Wide Crank Assembly are only Compatible with 9/6th inch pedals. Will not be compatible with Micargi Beach Cruiser's stock pedals. 

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


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. This is a do-it-yourself kit and being such all repairs, maintenance and modifications are the responsibility of the buyer. 


 Bicycle engine kit fits most 26" Wheel Bikes (Mountain, Cruiser, Chopper, Road) with V-frame. Please check to see if your bike is compatible. 


Product Dimensions and Specifications

48cc engine kit is about 9" height 9.5" length 7" width. The bicycle gas engine kit includes a mounting plate that fits on standard 25mm to 29mm frame tube. Larger frame size requires modification to the mounting plate and/or frame of your bicycle.

BBR Tuning 5G 4-Stroke bicycle engine kit offers:

2-3 HP (horse power)

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

Fuel Economy: MPG 100-150 miles per gallon

Oil Capacity: 250 mL (~8.45 oz)

Independent drive sprocket and chain does not interfere with your current drive chain and peddling can be restored with a wide crank assembly.



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

 1. BBR Tuning 2014 5G 4-Stroke Centrifugal Transfer Case (6:1 Gear Ratio)

 2. HuaSheng 49cc Pull Start  Bicycle Engine

 3. High Performance Low Profile Carburetor

 4. Upgraded Hush Muffler

 5. High Quality Japanese Main Bearings

 6. Heavy Duty 415 Bike Chain

 7. Upgraded Chain Tension Guide

 8. Chain Guard

9. Spark Plug

10. CDI (Ignition Coil)

11. Upgraded Twist Throttle and cable with matching grip

12. Engine Mounting Plate

13. Black Teardrop Gas Tank (1.5L)

14. Fuel Line

15. Throttle Cable

16. Gasoline Tank Switch

17. Sprocket Clamp Assembly

18. High Quality Needle Bearings on Both Ends Crank

19. 44 Tooth Chrome Sprocket with 9 Holes

20. Magneto

21. Kill Switch

22. Required Hardware and Gaskets

23. Bonus: Spark Plug Removal Too!

24. Bonus: Wide crank set with accompanying bottom bracket!

 Disclaimer: Operating a bike, motorized bicycle or bike with a bicycle engine kit installed involved some risk of serious bodily injury. Buyer accepts responsibility for any and all vehicle operations 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. Seller is not responsible for misuse of this kit or any warranty after installation. Not all motorized bicycles are allowed on road use. We make no guarantee as to the road legality of the bicycle engine kits. The risks that the Seller, Niche Webstores Inc. is not responsible for include among other things: falling, collisions with pedestrians, street, highway or roadway vehicles, striking obstructions or other person, unsafe weather conditions including temperature exposure, hypothermia, sunstroke, sunburn, heat exhaustion and dehydration.

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

What to expect Review by arsenalswim
As far as engines go, this is a really great one. Comes with all the parts and a helpful dvd to put it together. The engine has a smaller exhaust port that comes with it that works just fine. (Posted on 10/26/2017)
Good Job Review by Mock
Idealistically it would be Good to have a Card or Paper that Describes for Law Enforcement the under 50 cc Class.
As I Understand the Federal Guide Line They are Zero Impact Vehicles and are Not To Be Governed. (Posted on 5/2/2015)
great Review by Stephen Geeee
Johnny Fernandez sold me his hot little number, and it's a bad ass bike... it pulls my fat self (320lbs) up a sharp grade without bogging out... great motor it takes a beating now my aunt owns it and it's terrific for her too, the motor thus far has survived 3 owners!! (Posted on 12/3/2014)
Good little motors, but one needs above level tools and skill Review by Masito
These are good little motors, but one needs other than common tools and skill. The kit I received needed the teeth of the drive gear (the gear on the centrifugal clutch) to be filed from a square to round. I used a Dremel tool. The carburetor is factory capped and cannot be adjusted. I'm experiencing power lag issues and I will have to drill out the cap and either insert an adjusting screw or re-jet the carb. One must get a chain cutting tool in case the chain needs to be shortened. Nuts and bolts are of inferior quality and if not replaced with a higher grade, it will cost you very much time and frustration.
I can't imagine anyone without more than rudimentary mechanical skills wanting to assemble one of these! The reward is fulfilling upon finishing the project, but you must be patient, creative and have some knowledge of mechanics. (Posted on 11/25/2014)
great product Review by Jonny Fernandez
this engine is by far the best thing you can give to your bike.not only is it compact,but lasts for a very very long time! this is my favorite engine of them all and will be ordering me another,you can count on that bikeberry!!!
(Posted on 10/13/2013)
Ive had mine for about a week now I lived it at first until. Review by Ryan O
Ive had mine for about a week now I lived it at first until...... AND I THINK IT'S FABULOUS!! <3 (Posted on 3/21/2012)

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Customers Q & A

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Q: Is this service available in India?

Posted On: 3/3/2018 By: Sayandip

A: If you would like to have our 49cc BBR Tuning 5G Pull Start Bicycle Engine Kit shipped to India, please contact our customer support for a shipping quote.
Q: I Just need moter Flying horse 49 cc. How much is it

Posted On: 4/12/2016 By: Robert Lindstrom

A: The engine only of the 49cc BBR Tuning 5G Pull Start Bicycle Engine Kit is $149.95

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