I'm starting my first build and I have a GRUBEE 2011 SkyHawk GT5 66cc/80cc Bike Motor Kit and a Skyhawk Frame. I searched here but have not seen any builds with this frame. Has anyone had any sucess with it? I was looking at the shift kit that Sick Bike Parts sells as well. It's rather expensive but may be worth it to not have to deal with rear wheel issues that some experience. Are there other alternative shift kits that work well?