49cc bike engine kits

My deal is looking for some thing like this
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This is what you have all been waiting for the 49CC 4 Stroke (4 Cycle) Daemon Bike Engine kit. This Engine has an incredible 2.10 to 2.23 HP which is very powerful for an motor engine of that size. The kit comes with everything you will need to get started. Just add oil and gas. (Oil is not mixed in with the gas) The 4 cycle engine kit can reach speeds upwards of 60 MPH and has enough power to move even a larger individual. These engines have excellent fuel economy and gets about 150 miles per gallon of gas.
49cc Daemon Engine 4 Stroke Motor Kit includes:

1. 49cc Daemon Engine 4 Stroke Motor Kit – Complete
2. 2.10 – 2.23 HP @ 6800RPM
3. Friction Clutch; Pull Start
4. Magneto With Solid State CDI Ignition
5. 44Tooth, 9 Hole Chrome Sprocket
6. 5 Plate Sprocket Kit
7. 2.5 Liter/0.66 Gallon Fuel Tank, Tear Drop Shape (Black Color)
8. Twist Throttle With Engine Kill Switch
9. Improved Gas Valve
10. Drive Chain Idler
11. Standard Carburetor
12. Chrome Lined Cylinder Wall
13. Head With Center Fire Spark Plug
14. 202 Crankcase Bearings
15. Needle Bearings On Piston Wrist Pin
16. Standard 410 Chain
17. Chain Guard
18. All The Mounting Brackets, Gaskets, And Hardware
19. Mounting Plate For Larger Bike Frames
20. 30 Day Limited Warranty Included – FREE

Bicycle Requirements:
This 49cc 4 Cycle Bicycle Engine Kit fits most Men’s 24″ and larger bicycles which includes mountain, cruiser, the bike must have a V-frame with at least a 8.5″ height clearance for the engine. Larger frame size might require drilling of the bike.
Dimensions:
This 49cc 4 Stroke Daemon Engine Bike Motor Kit is about 8.5″ height 7″ length 5″ width and fits on most standard 24″ – 26″ or 25mm 29mm frame bicycle frame tubes.. This engine kit only adds about 22 lbs to your bike.
Gas And Oil Mixture For Fuel Ratio: Use of a good synthetic 2 stroke oil is recommended (Seperate from the Gas)
This bicycle motor engine kit is a 4 cycle/4 stroke design, therefore, a gasoline/oil mixture is not necessary (Use a good 4 cycle oil):

Skills And Experience:
The buyer may need some basic hardware skills, tools, and it takes roughly around 2-3 hours to install and to do some adjustments and fine tuning.
Notices & Disclaimer:

• We cannot guarantee that this kit will fit your specific individual bike(s).
• Operating a bike, motorized bicycle or bike with a bicycle engine kit installed involves 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.
• Seller is not responsible for misuse of this kit or any warranty after installation.
• Not all motorized bicycles are allowed for on road use.
• We make no guarantee as to the road legality of these bike motors.

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It looks very interesting as seemed the engine kits used to rebuild an bike to motorized. It is not a motorcycle but a motorized bike. I am trying to work it out and see what it will looks like when assembled.