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Thunder Shark Pro Racing 66cc/80cc Bicycle Engine Kit - 5.0 HP

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Thunder Shark Pro Racing 66cc/80cc Bicycle Engine Kit - 5.0 HP


These Thunder Shark Pro Racing 66cc/80cc bicycle engine kits give 5.0 HP “the powerhouse engine of the industry.”

Starting your Thunder Shark Pro Racing 66cc/80cc Bike Motor Kit (Standard Finish). Pedal normally or use engine power at your option. The engine starts quickly when the handlebar clutch lever is released while pedaling. Twisting the throttle controls the speed to 35 mph. Speed depends on rear sprocket ratio and weight of rider.

Thunder Shark Pro Racing 66cc/80cc Bike Motor Kit (Standard Finish) fits best on bikes with 25 to 30mm diameter 70 degree Vee type frames but can be installed on larger diameter tube frames with modifications. “Looks Cool” on the older cruiser type coaster brake bikes.
This bike motor kit comes with everything that you'll need except gas and oil! You will be able to stop or start the engine as you ride. There is no rope pulling needed and it gives more speed and gets around 150 miles on a gallon of gas. Please Tell a Friend about this product and help spread the word about motorized bike.

5.0 HP Engine Kit Includes: 

  1. Thunder Shark Pro Racing 66cc/80cc Bicycle Engine - 5.0 HP
  2. Dio Reed Valve Zeda Racing Cylinder and Carburetor Assembly
  3. Shark Racing CNC Cylinder Head - High Performance
  4. CNC High Sprocket Assembly - High Performance
  5. CNC Universal Mount - High Performance
  6. Boost Expansion Chamber Muffler - High Performance
  7. Supercharge CDI - High Performance
  8. Spring Chain Tensioner - High Performance
  9. Stainless Steel Heavy Duty 66cc / 80cc Engine Screw Set
  10. Friction Clutch, Pedal Start
  11. Magneto With Solid State New Design Capacitive Discharge (CD) Ignition
  12. 2 Cycle air cooled gas / oil mix engine.
  13. 2.0 Liter/0.66 Gallon Fuel Tank, Tear Drop Shape (Black Color)
  14. Push Button Clutch Lever And Cable
  15. Twist Throttle With Engine Kill Switch
  16. Fuel Line
  17. Improved Gas Valve
  18. Drive Chain Idler
  19. Improved NT Carburetor
  20. Chrome Lined Cylinder Wall
  21. Head With Center Fire Spark Plug
  22. 202 Crankcase Bearings
  23. Needle Bearings On Piston Wrist Pin
  24. 415 Heavy Duty Chain
  25. Chain Guard
  26. Steel Tube Intake
  27. Fuel Filter
  28. Pulling Tool Kit
  29. Universal Motor Mount
  30. All The Mounting Brackets, Gaskets, And Hardware Including Nylon Locking Nuts
  31. 6-Month Limited Warranty Included - FREE
  32. Free technical support within one (1) week after receiving the kit

How to Install 80cc 66cc 48cc 2-Stroke Bicycle Engine Kit

 Orders received Monday - Friday by 3:00PM EST are eligible for 
Same Day Shipping! Except for USPS which ships the next business day.

Same Day Shipping Available 

Gas And Oil Mixture For Fuel Ratio: (Use of a synthetic 2 stroke oil is recommended.)

This bicycle motor engine kit is a 2 cycle/2 stroke design, therefore, a gasoline/oil mixture is necessary as follows:
  • When New: 16 to 1 (8oz per Gallon)
  • After 2 Tanks Of Break In: 32 to 1 (4oz per Gallon)
The engine crankshaft bearings are lubricated from the oil in the gas mix. A rich break in oil mixture ensures bearings will not cease during engine break in period.

Our 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.


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If you need help with installation or troubleshooting, kindly use our Builder Locator to find builders near you. Builders are experts with motorized bicycles.

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