49cc 4G T Belt Drive Complete Gas Powered Engine Kit

$399.99

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The 4G T Belt Drive Engine Kit

This 4 stroke motorized bicycle engine kit comes with everything you need to convert most V-frame bicycle to a 49cc gas powered scooter. Simply clamp on the engine, install the sprocket, gas tank, and other hardware and you'll be up a running in a couple of hours. Installation requires some tools and a moderate mechanical apptitude.

High quality 4 stroke Hua Sheng engine gets you 150mpg with top speeds of about 35 MPH (pretty fast on a bicycle). These things are built to last and require virtually no maintenance.

With the built in clutch you maintain full function of the original bike. Pedal and ride your bike like normal. When you want to engage the engine simply give the engine gas and go. To power off simply press the included kill switch.

New Motorized Bicycle Engine Videos
See the new 4 stroke bicycle engine in action!
Click here to watch it go 35mph!

Here are a few examples of this kit installed...

You can find many more examples in the customer bike gallery.

Click on an image for a larger view.

Get answers to commonly asked questions in the FAQ's section.

Kit Includes:

4 cycle 49cc 2.5 hp HuaSheng engine
5 to 1 power ratio T Belt Drive gearbox
11 tooth drive sprocket with freewheel
3 piece wide crank
50 tooth 9 hole chrome sprocket
2.5L fuel tank
Twist throttle & cable with kill switch
Heavy duty chain
All the mounting brackets, gaskets, and hardware.
Complete users manual / installation instructions.
6 month limited warranty.

New 4-cycle 49cc Bicycle Engine Kits
49cc 4-stroke bike motor kit
Easily Convert Your V-Frame Bicycle!

Engine Specifications:
Engine Type	Air-cooled 4-Stroke OHV Single Cylinder
Max Power(kw/r/min)	1.5 KW / 2 HP / 6800
Fuel Consumption(g/kw·h)	≤480
Fuel Consumption(L/h)	0.78
LWA(dB(A))	101
Net Weight(kg)	7
Displacement(cc)	49.1
Fuel Tank Capacity(L)	--
Oil Capacity(mL)	250
Ignition System	TCI
Compression Ratio	7.4
Carburetor	Float
Starting System	Recoil
Approximate Dimensions	Height - 9 1/2", Width - 11", Length - 9"
Click here for a demonstration on measuring your frame for the 4G kit.
This kit is legal in almost all states. Most laws stipulate that any motorized vehicle under 50cc is legal to operate without a license, registration, or insurance. You can find a kit with a larger engine, but you will be required to have a drivers license and you must license, register, and insure your scooter. Don't bother with the hassle--get the biggest engine available that doesn't require license, registration, and insurance!

DISCLAIMER: Operating this motorized bicycle or bicycle engine kit involves some risk of 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. Birddog Distributing, Inc. is not responsible for injuries and/or damages resulting from operating this motorized bicycle or bicycle engine kit . This kit is not recommended for use by persons under 16 years of age. Obey all traffic regulations. Always wear a helmet while riding. Remember that you are riding a motorized bicycle and other traffic may not be able to see you. Never operate your motorized bicycle on a pedestrian through way or sidewalk while the engine is running. Never operate your motorized bicycle in an unsafe manner. Check local and state laws before riding on streets. Engines larger than 48cc are not legal to operate on the street.

Optional Upgrades:

Thumb Clutch And Brake

Mid Frame Kick Stand

Heavy Duty Axle Kit

Looking For Parts, Accessories, & Additional Upgrades?
We stock a full selection of replacement parts & accessories for the 4-stroke engine kit.

Latest Reviews

Brian Crozier - 01/22/2010

The 3 piece crank set they sent with mine worked fine, but I do not seem to get as good a gas mileage with the belt drive (120 mpg as opposed to 150-170 mpg). Also the protective cover for the belt drive does not fasten securely, the screws vibrate out and leave the belt drive cover loose, unless you bring tools and extra screws. Otherwise the belt-drive is quieter with less mess.

michael scheper - 10/23/2009

this system is very wide. that crank arms that come with the kit are about 2 inches to narrow. the left crank arm hits the drive assembly.

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