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home > GT4 Pro Racing 66cc/80cc Bicycle Engine Kit > GT4 Pro Racing 66cc/80cc Bicycle Engine Kit

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GT4 Pro Racing 66cc/80cc Bicycle Engine KitNOTE: Top end assembly required for this engine kit. How to Install The Top End of a 80cc 66cc 48cc 2 Stroke Bicycle Engine Kit The kit is upgraded with the GT80 4 petal reed box and the large 16mm Keihn Carburetor assembly. 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

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NOTE: Top end assembly required for this engine kit.

How to Install The Top End of a 80cc 66cc 48cc 2-Stroke Bicycle Engine Kit

The kit is upgraded with the GT80 4 petal reed box and the large 16mm Keihn Carburetor assembly.

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.

Starting:

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.

Bicycle Motor Engine Kit Includes: (View Larger Image)

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

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

GT7 66cc Slant Head (Standard Finish) Bicycle Engine Kit FAQs:

Question: How much weight will this engine kit add to a bike?
Answer: The 48cc, 66cc/80cc engine kits will add 24 lbs to your bike. The 49cc engine kit will add 31 lbs to your bike. Note: We suggest a 26" Men's standard V frame bike.
Question: What fuel do I use for this engine kit?
Answer: This 2 stroke stroke motor kit requires an Oil And Gas Mixture as follows:

When New: 16 to 1 (8oz per Gallon)
After 2 Tanks Of Break In: 32 to 1 (4oz per Gallon)

You should get 100-150 Miles per gallon and achieve 20-40 MPH depending on climate, altitude, bike weight and rider weight
Question: How do I start and stop my bike with the GT2B 48cc?
Answer: The starting and stopping of this two stroke motor kits is this:

You can still pedal bike like normal with clutch lever held in or locked in with button.

To Start: It's just like riding a bike normally, hold in the clutch and pedal the bike to get some speed, then release the clutch to "Jump Start" the motor. If you know of or remember jump starting a Manual VW Bug this start method is the same.

To Stop: While the engine is running you can hold in the clutch and the engine will idle. Push the Kill Switch on the throttle to kill the motor. The clutch must be held in when the bike is in motion or the motor will keep running.

Bicycle Requirements:

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.

Dimensions:

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 lbs to your bike.

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.

We Can ship to PO BOXES at this time. For International and Canadian shipping we suggest UPS STANDARD. This does not cover Customs Brokerage, Duties, and Taxes… these are charged to the consignee on delivery). We have found that this is the cheapest way to send packages Internationally and to Canada.

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: Down through the years China 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.

GT4 Pro Racing 66cc/80cc Bicycle Engine Kit

Name: GT4 Pro Racing 66cc/80cc Bicycle Engine Kit
Brand: mein-werk.net
SKU: 55656820383
Price: 174.95 USD
Availability: InStock
Rating: 4.488700000000001 (817 reviews)