GT4 Pro Racing 66cc/80cc Bicycle Engine Kit
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 V type frame like a mountain bike, but can be installed on larger diameter tube frames like beach cruisers. 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 MPH depending on rider weight and rear sprocket gear ratio.
This bike motor kit comes with everything that you’ll need except gas and oil. Since this is a 2 stroke engine, 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 at around 100 miles per gallon.
The Motor will require some assembly, the top end of the motor must be installed.
Bicycle Motor Engine Kit Includes:
- GT4 Pro Racing 66cc/80cc Motor 3.25 HP
- With GT80 Reed Valve & Keihin Carburetor Clone Assembly – $60 VALUE!
- Friction Clutch; Pedal Start
- Magneto With Solid State CDI Ignition
- 44Tooth, 9 Hole Chrome Sprocket
- 3 Plate Sprocket Kit
- 2.0 Liter Fuel Tank, Tear Drop Shape (Black Color)
- Chrome Muffler
- Push Button Clutch Lever And Cable
- Twist Throttle With Engine Kill Switch
- Improved Gas Valve
- Fuel Line #2
- Idler Pulley Chain Tensioner with Bearings
- Chrome Lined Cylinder Wall
- Head With Center Fire Spark Plug
- 202 Crankcase Bearings
- Needle Bearings On Piston Wrist Pin
- Improved 415 Chain
- Chain Guard
- Tool Kit
- All The Mounting Brackets, Gaskets, And Hardware Including Nylon Locking Nuts
- Universal Motor Mount
- Complete User Manual
- 6-Month Limited Warranty Included – FREE
- Standard Slant Cylinder Head
This bicycle motor engine kit fits most Mens 26″ and larger bicycles which includes mountain, cruiser, chopper and road bikes with a V-frame with at least a 8.5″ height clearance for the engine. Larger frame size requires drilling into bike frame and use of the universal face plate.
This 66cc/80cc bicycle motor engine kit is about 8.5″ height 7″ length 5″ width and fits on most standard 26″ or 25mm 29mm frame bicycle frame tubes. Larger frame size requires drilling into bike frame and use the universal face plate. This engine kit only adds about 24 pounds to your bike.
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.
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 And 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.
Disclaimer: Chinese bike engine factories have always advertised their biggest engine as 80cc, therefore we have listed them the same way on our website. However, the bore and stroke of an 80cc being 47x38mm only equals 66cc. Therefore there is no such thing as an 80cc bike motor and it truly does not exists and we want to make sure that you are aware of this.
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.