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

Product Details

• Amazon Sales Rank: #45554 in Sports & Outdoors
• Brand: Grubee SkyHawk
• Model: SkyHawk 80cc
• Dimensions: 26.00 pounds

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

Customer Reviews

66cc/80cc Grubee Skyhawk Motor Kit
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.

Fun to ride when finally assembled
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
It has no return policy. Don't buy, if it is street illegal in your state.