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GRUBEE SkyHawk GT5-SR SUPER RAT 66cc/80cc Angle Fire Slant Head Bike Motor Kit (Standard Finish)

GRUBEE SkyHawk GT5-SR SUPER RAT 66cc/80cc Angle Fire Slant Head Bike Motor Kit (Standard Finish)

  • $ 25900

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Only California shipped orders are charged sales tax
We cannot ship any 2-stroke Bicycle Motors or Bike Engine Kits to California due to CARB regulations.

Nationwide Access, LLC is an authorized distributor of Grubee Skyhawks in the U.S. and has an approved E.P.A. certification.

GRUBEE SkyHawk GT5 SR 66cc/80cc (Standard Finish) Slant Head Bike Motor 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 GRUBEE SkyHawk GT5 66cc/80cc?
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 24" 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 48cc bicycle motor engine kit 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 bike frame and use the universal face plate. This engine kit only adds about 24 lbs to your bike.

All are products EPA Approved and Certified.

* Orders received Monday - Friday by 3:00PM EST are eligible for
Same Day Shipping! Except for USPS which ships the next business day.

Same Day Shipping Available We can ship to PO BOXES at this time.
We Cannot ship any 2-stroke to California at this time, surrounding states like Nevada, Oregon, Washington and Arizona are OK.

UPS (International) Standard {Ground} - For Canadian shipping.

UPS (International) Express Saver {AIR} - For all other International orders must travel by air

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 to Canada and Internationally.

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 & 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).
  • Due to California Air Resource Board (CARB) regulations we cannot sell to California Residence at this time.
  • 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.
  • Not all motorized bicycles are allowed for on road use.
  • We make no guarantee as to the road legality of these bike motors.

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.

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