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(Discontinued) Grubee SkyHawk GT-5SR SUPER RAT Silver 66/80cc Angle Fire Bike E Item# GI-SILV80ANGLE-SR

OUR PRICE: $199.00
List Price: $419.95

The new high performance Grubee Skyhawk GT5 Super Rat Angle Fire 66cc/80cc bicycle engine kits is the strongest and fastest engine to date! The new engine kit comes with many huge improvements such as a larger front mount diameter (40mml/1.57in), a larger rear mount diameter (32mm/1.26in), and an integrated CDI Ignition Coil keeping the engine looking clean and making installation easier. This engine kit also comes with an upgraded high performance CNS carburetor that is designed to improve air flow and efficiency with a larger vent intake, low profile air filter and the new high quality EPA Good Year fuel line. Another great improvement is the upgraded muffler with built in heat shield for less heat and a longer Palladium cartridge for an extra quite muffler. Newly developed with all the latest components available, these engines are the highest quality and highest performing engines on the market today. Often referred to as the "Rolls Royce" of bicycle engine kits, the Grubee name is well known for the quality and workmanship that goes behind each kit. Have you tried the rest? Now try the best!

This kit comes with every thing that you'll need to convert a bicycle into a motorized bike. You will still be able to pedal the bike and ride like normal or start the engine by releasing the clutch lever. There's no rope pulling needed. You can stop or start the engine as you ride. 

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

6-7 HP (horse power)

30 to 45 mph depending on the gear ratio and weight.

MPG 100-150 miles per gallon

Independent drive sprocket and chain does not interfere with your current drive chain and peddling

Product Dimensions

80cc engine kit is about 8.5" height 7" length 5" width. Kit fits on standard 25mm to 29mm frame tube. Larger frame size requires drilling into bike frame and use the universal face plate. Ensure proper fit by reviewing the minimum dimension requirements diagram on the right. 

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.


Industry Leading 6 Month Warranty against manufacture defects. We cannot warranty issues caused by user neglect or improper use of engine. 


Package includes

 1. Grubee SkyHawk GT-5RS Angle Fire 2 Cycle 66cc/80cc Engine Kit

 2. High Performance CNS Carburetor

 3. Upgraded Hush Muffler with Heat Shield

 4. Clutch Cable

 5. Drive Chain Idler

 6. Upgraded: High Quality Japanese 203 Main Bearings

 7. Chain

 8. Chain Tension Guide

 9. Chain Guard

10. Spark Plug

11. Upgraded: New style Integrated CD Ignition Coil

12. Upgraded Alloy Push Clutch Lever

13. Upgraded Twist Throttle and cable with matching grip

14. Universal T-Plate for larger frame tube diameters

15. Black Teardrop Gas Tank (2.5L)

16. EPA Good Year Fuel Line

17. Throttle Cable

18. Clutch Cable

19. Gasoline Tank Switch

20. Sprocket Clamp Assembly

21. Sprocket Clamp Bolts

22. Large Spring (Heat Shield Spring)

23. Extension Spring (Recoil Spring)

24. High Quality Needle Bearings on Both Ends Crank

25. 44 Tooth Chrome Sprocket with 9 Holes

26. Upgraded: Newly Designed and Sealed Magneto Loop Set

27. Kill Switch

28. Bonus: Sprocket Removal Tool

29. Bonus: Spark Plug Removal Tool

30. Bonus: Extra Spark Plug Included in Tool Kit

31. All the needed mounting brackets, gaskets, and hardware

32. Complete easy to follow installation instructions


Fits Most 26" Wheel Bikes (Mountain, Cruiser, Chopper, Road) with V-frame.

Due to Regulations no California Residence Buyers. California Residence Please Check California Air Resource Board


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.



Disclosure of accurate engine size: While we have chosen to use the long standing factory branding engine size of "80cc", the true displacement of the bicycle engine is 66cc. Down through the years China bicycle engine manufactures have advertised their biggest engine as 80cc, therefore we have listed them in the same way on our website. However, the bore and stroke of an 80cc being 47x38mm equals 66cc. Therefore the true displacement of the 80cc bike motor is 66cc. In the west, the volume of a cylinder is calculated by using the formula Volume = Pi x Radius Squared x Stroke. However,in the east the displacement of an engine includes the area of the cylinder head's combustion chamber as well as the volume of the cylinder. As such, there lies a discrepancy between measuring standards by the manufactures in China with those in the United States. As such, all "80cc" engine kits on the market today are actually 66cc in displacement size if measuring by US standards. 

Download Instruction Manual


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