Jet 66cc/80cc Motorized Bicycle


Out of stock


This kit is upgraded with the supercharge CDI.


Convert your bicycle to a motorized bicycle by adding a 2 stroke engine kit to it. The kit fits best on bikes with 25 to 30mm diameter front down tube and 70 degree Vee type frame like a mountain bike but can be installed on larger diameter tube frames with modifications. “Looks Cool” on the older beach cruiser type coaster brake bikes. The motor bolts to the bicycle frame in the center of the frame (additional mounting options available). A second Heavy Duty chain is attached from the motor to the rear wheel via a second sprocket attached to the rear wheel.


2 stroke motor kits are started by “bump” starting them. While holding in the clutch, pedal the bike quickly. When you release the clutch after the bike gets to speed, it push starts the motor.

The kit will average around 25-35 M.P.H depending on rider weight and rear sprocket gear ratio.

Gas Mixture:

This bike motor kit comes with everything that you’ll need except gas and oil since this is a 2 stroke, 2 stroke oil needs to be added to the fuel. Always mix gas in a gas can, not the gas tank. When the engine is new, it would need to be broken in with a richer mixture, after at least 1 tank of gas, then the mix can be “leaned out” (less oil). Never go less than 32:1 ratio (4oz of oil per Gallon).

  • New Motor – 16:1 (8 oz of oil per gallon)
  • After Broken in – 32:1 (4 oz of oil per gallon)

You will be able to stop or start the engine as you ride. This kit gets maximum fuel efficiency stock at around 100 miles per gallon.

The Motor will require some assembly, the top end of the motor must be installed.

This motorized bicycle includes:

  1. 26″ Roadmaster Granite Peak Men’s Bike
  2. Silver Slant 66cc/80cc Angle Fire Slant Head Engine 2.75 HP
  3. Comes with Super Charge CDI
  4. Friction Clutch; Pedal Start
  5. Magneto
  6. 44Tooth, 9 Hole Chrome Sprocket
  7. 3 Plate Sprocket Kit
  8. 2.0 Liter Fuel Tank, Tear Drop Shape (Black Color)
  9. Chrome Muffler
  10. NT Carburetor
  11. Push Button Clutch Lever And Cable
  12. Twist Throttle With Engine Kill Switch
  13. Improved Gas Valve
  14. Fuel Line #2
  15. Idler Pulley Chain Tensioner with Bearings
  16. Improved NT Carburetor
  17. Chrome Lined Cylinder Wall
  18. Head With Center Fire Spark Plug
  19. 202 Crankcase Bearings
  20. Needle Bearings On Piston Wrist Pin
  21. Improved 415 Chain
  22. Chain Guard
  23. Tool Kit
  24. All The Mounting Brackets, Gaskets, And Hardware Including Nylon Locking Nuts
  25. Universal Motor Mount
  26. Complete User Manual

6-Month Limited Warranty Included – FREE

The Roadmaster Granite Peak is a bike that will get you where you need to go and allow you to have a little fun along the way. The features include a steel mountain style frame with the front suspension fork, 18-speed twist shifters, three-piece mountain crank, and alloy wheels. The tires are thick like a mountain bike tire and so versatile that you can plan a ride just about anywhere, from a beach boardwalk to off-road adventures. Roadmaster has been a trusted American value in recreational bike riding for decades.

    • Mountain: front suspension
    • Popular for trails and casual riding; suspension improves handling for off-road
    • Rugged trails and path riding
    • Steel mountain style frame
    • 18-speed twist shifters
    • Front and rear linear pull brakes
    • Alloy wheels and 3-piece crank

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

Bicycle Requirements:

This bicycle motor engine fits most Mens 24″ and larger bicycles which includes mountain, cruiser, chopper and road bikes with a V-frame with at least an 8.5″ height clearance for the engine. Larger frame size requires drilling into bike frame and use of the universal face plate.


This 80cc bicycle motor engine is about 8.5″ height 7″ length 5″ width and fits on most standard 24” – 26” or 25mm 29mm frame bicycle frame tubes. Larger frame size requires drilling into the bike frame and use the universal face plate. This engine only adds about 20 lbs to your bike.

Skills & 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:

  • Operating a bike, motorized bicycle or bike with a bicycle engine 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.
  • Seller is not responsible for misuse of this 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.

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.