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(Discontinued) Grubee StarFire Silver 66/80cc Bicycle Engine Kit EPA Certified Item# GI-STARFIRE-80SILV

OUR PRICE: $199.95
List Price: $399.95

In limited stock only. Made by the most reputable bicycle engine kit brand, Grubee Motors, this motorized bicycle engine kit is manufactured with only the most premium quality parts! Newly developed with all the latest components available, these engines are the highest quality and highest performing engines on the market today with unique and useful components, such as the Dual Brake Cable Throttle, only found in a Grubee StarFire 66cc/80cc bicycle engine kit. The new Dual Brake Cable Throttle handle is perfect for riders who desire handle brakes with their motorized bikes. 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 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!

5 - 6 HP (horse power)

25 to 40 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

66cc 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 StarFire GT4 2 Cycle 66cc Engine Kit

 2. High Performance Speed Built Carburetor

 3. Upgraded Hush Muffler

 4. Clutch Cable

 5. Drive Chain Idle

 6. High Quality Japanese Main Bearings

 7. Chain

 8. Chain Tension Guide

 9. Chain Guard

10. Spark Plug

11. CD Ignition Coil

12. Upgraded Alloy Push Clutch Lever

13. Upgraded Twist Throttle and cable with matching grip

14. Universal Plate for larger frame tube diameters

15. Black Teardrop Gas Tank (2L)

16. 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. Magneto

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

33. Bonus: Dual Brake Cable Throttle


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.

Download Instruction Manual


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Customers Q & A

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Q: bike engines ,where you do not have to mix oil in gas thanks mike

Posted On: 9/22/13 By: mike

A: All 2-Stroke engines require mixing the oil with the gas. If you were looking for a bike engine kit that did not require mixing oil and gas, you would be interested in a 4-Stroke bicycle engine kit. We currently have one 4-Stroke bike kit available, it can be found here: http://www.bikeberry.com/49cc-flying-horse-5g-pull-start-bicycle-engine-kit-4-stroke.html

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