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Grubee SkyHawk 80cc Black Bicycle Engine Motor Kit EPA Certified | 
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| Brand: Grubee SkyHawk
Category: Sports
Buy New: $399.95
Rating:  5 reviews
Sales Rank: 140383
Media: Misc.
Shipping Weight (lbs): 26
Dimensions (in): 16 x 14.7 x 7.3
Model: SkyHawk 80cc
ASIN: B002J89LVA
Availability: Usually ships in 1-2 business days
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| Features:
| • | 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 |
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| Editorial Reviews:
Product Description
The long awaited Grubee Skyhawk GT5 80cc bicycle engine kits are here! Newly developed with all the latest components available, these engines are the highest quality and highest performing engines on the market today. Often referred to as the "Rolls Royce" of bicycle engine kits, the Grubee name is well known for the quality and workmanship that goes behind each kit.
This kit comes with every thing that you'll need to convert a 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.
80cc 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.
Includes
1. Grubee Starfire GT5 2 Cycle 80cc Engine Kit
2. High Performance Low Profile Carburetor
3. Upgraded Hush Muffler
4. Clutch Cable
5. Drive Chain Idler
6. High Quality Japanese Main Bearings
7. 415 Bike 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
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| Customer Reviews:
 Overpriced and bad description July 9, 2010
Butte Metz (Dallas, Texas)
0 out of 1 found this review helpful
I have used this engine kit to power my diamondback beach cruiser for a year. The engine is actually rated at 2.8 HP new although most experts say the power will go up to about 3.5 after breaking in. It will get my heavy (280 lb) body to about 25mph. Still need to pedal up hills but not too difficult. Engine is quiet. Idling along the engine is inaudible at distances greater than 50 feet. Full throttle it is still very quiet compared to a lawn tool.
Price is way out of line. Wholesale price from China is less than $50US. They retail around $99-130 online from other sellers.
The chain in the kit is not very good. You will need to upgrade to a 550 chain sold at most motorcycle shops and farm hardware stores.
You will need to use thread lock liberally on the bolt threads. Not included with the kit but recommended in the manual.
The method of mounting the sprocket to the era axle leaves room for problems. Mine was impossible to align perfectly. Had the chain derail as a result, bending the rim. There is a solid axle rim and tire designed for this kit. Save yourself the headache and get it.
With proper care this engine can get you about 15-20,000 miles. Invest in good tires and a good bicycle drum brake also and it will give you reliable service.
 66cc/80cc Grubee Skyhawk Motor Kit August 30, 2009
Lucas T. Ufi
3 out of 3 found this review helpful
The Kit was quite easy to assemble, the hardest part was adjusting it to fit the frame and adjusting the chain which is still very easy to do. It works great, and only goes about 25mph with my 250lb rear on it. Runs like like a champ though, I'm still on the break-in gallon of gas though.
Been working with these kits for almost a year... May 3, 2010
Furball (USA)
I started off with a 4-stroke engine which threw keys every time I attempted to engage the clutch to ride. Because of this...I ended up buying one of these 66 cc kits. Having experience...as well as reading everything on several forums on motorized bikes...took about 8 hours to put together. Half of this time was spent taking off the 4-stroke engine...because I will put it back on in the future once I can afford to get a belt drive.
The biggest problem with the kit I used was the magneto/CDI wiring. Having a friend help me who had built another kit about 2 months earlier...he & the directions were unclear on the correct wiring...so we fried the electrical system. Will by buying another magneto/CDI this week & be back on the road late this week or early next week.
For those of you worried about the 66 cc engine...don't be. While many states require 50 or less cc...as long as you take off all stickers/plates saying the size of the engine & ride safely...you will not be bothered. As with anything where you draw attention to yourself...you will get that attention when you don't want it.
If you need any questions answered...feel free to join some of the forums available to you. To find these...put motorized bicycle into your favorite search engine. Have all ready gotten the correct wiring sequence on the electrical system...as well as other information you will want/need to get the most out of this hobby. All of you who did this without the help of others who have come before you...means you didn't need all of the stress & bad ratings you have given these engine kits. I & others are more than happy to help you if you will only ask.
 Fun to ride when finally assembled November 14, 2009
HostileHST (Oregon, USA)
5 out of 5 found this review helpful
Fun to ride when you finally get it assembled...
Took me days to get this thing road ready, not 6 hours as some claim. I can see it taking "only" 6 hours if you have lots of spare parts and have worked with every known frame style, cause mechanical skills will not be the only thing you need and I will brag a bit, I have plenty of mechanical skills with tools and I did not find this to be an easy task, but even then it was more time consuming due to needing to take breaks from so much frustration.
First thing to break during assembly was one of the carburetor flanges that goes to the intake side and Kings Motorbikes has yet to respond to my email. The carb breaking was one of two major issues I ran into, second being the chain binding. As far as the carb went, here are for finger like tangs and the top one broke clean off leaving a nasty gap between the carb and intake pipe. Once I found a way to work around it, the carb still refused to supply gas, but that turned out to be a poor quality intake gasket sucking tons of air in. I added an additional gasket to the existing one and it finally runs on it own (and can be riden now).
Clutch will vibrate your teeth apart as well as the chain causing alignment issues. I had to add my own lower chain guide and added one just behind the engine so the chain will not fall off the engine sprocket and get bound inside the sprocket cover. I had heck of a time unjamming it, but the upside was, I was able to pedal home. This was with the front and back sprockets aligned up pretty decent, granted, not perfectly on my particular frame.
BTW, if planing to put this on an aluminum frame or oval lower frame bar, it will be a pain! Best suited for rouned frame piping work, but you can still get it to fit with additional hardware and hacking up the air filter housing to cram it into the frame, worked for me :0)
If the price was any higher, I'd be pretty unhappy with the kit, but now that I have it going, I am in a bit better mood.
Don't trust the bolts, washers or nuts, they are very LOW quality. I am upgrading to Stainless steel and #8's. High stress areas like the motor mounts, intake and exhaust, use #8 bolts. For covers, Stailess steel hex will add a nice touch and also last a whole lot long without stripping out. If you plan to use any sort of lock tight, don't use anything more then the blue, the red is way to strong and is simply not needed. Lots of good sites to help us all out when needed. The chain tensioner in this kit has the worst bolts possible. I stripped the main 2 that clamps it ot the frame right away. I have since put on a differnt and much nicer looking set up to keep the chain at bay.
Warning! warn your mate ahead of time that you will be using every 4-8 letter cuss word ever made in the history of human kind, also, you might make up some new ones cause for some of us, you might not get a kit so forgiving like I was unfortunate to get. Sure I got mine going, but it cost me my wife, kids, dog and 86'd out of the hardware store.....ok, not quiet that bad, lol.
 Motor Bike October 29, 2009
Abouzar Ghavami Pakdehi
2 out of 6 found this review helpful
It has no return policy. Don't buy, if it is street illegal in your state.
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