Re: 2011 grubee 48cc
The 80cc and 66cc are one in the same my friend. 80cc is used for marketing purposes only, the actual engine displacement is 66cc. I use the bigger 66cc Grubee Skyhawk angle-fire series. All kits are about the same, it's the modifications you do that will make a difference. Best of luck with your project, let us know if we can help.
Mile High Motor Bicycle
EZ Motorbike Dealer - Denver, CO