If you’re looking for a tough, reliable, long-lasting bicycle engine kit look no further than the BBR Tuning 5G 4 stroke engine!

The 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 Don't be fooled by other retailers, selling outdated, non-EPA approved, old generation bicycle engine kits!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!

*Note: 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.

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”). Bike must also be compatible with a 3-piece wide crankset included with each engine kit.

Assembly of engine and motorized bicycle required. Click here
for instructions

Attention: This kit does not come included with a bottom bracket assembly. If the bicycle you are converting has a 1-piece crank, you will need to purchase a Bottom Bracket Assembly. If your bicycle has a 3 piece crank, you may not need this piece. However some bicycles with 3 piece cranks may not be compatible with the wide crank assemblies included with this kit.

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

** Also 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.

49cc BBR Tuning 5G 4 Stroke Pull Start Motorized Bicycle Engine Kit Includes:

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. Complete Digital Installation Guide
24. Bonus: Spark Plug Removal Too!
25. Bonus: Wide crankset

The BBR Tuning 49cc 4-Stroke bike 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.

• 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)

** 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.

Bottom bracket is not included. If the bike being converted has a one piece crank assembly, you will need a bottom bracket found here 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.

BBR Tuning 4-Stroke Engine Kits require fuel and oil for proper operation.

• Recommended Gas Grade: 87 Octane
• Recommended Oil: Maxima Scooter Pro Plus 4-Stroke Synthetic 10w30 Motor Oil 1 Liter