I have been back and forth with many people now. I really want to use a 4 stoke engine on my build but I have come to too many problems. The 49cc will not give me the speed or hill climbing ability I want. And the 99cc will give me jus wat I need in both categories but is way too big. Jus wish it was smaller. I need something the cops aren't gona look at and say hmmm that looks bigger than 49cc haha . So my questions to everyone is.... Is the hill climbing good with these 79cc engines?? What is the top speed that I can get out of them? Hopefully fast ha and last but not least are they also too big to pass off as a no license necessary to the cops?? Haha geez this build is becoming more complicated than I thought if would be haha about to get this bike sent to me within the next few days but just can't find the right 4 stroke. I am stuck on them due to the fact that I am going to be taking very long rides... Need reliability and jus Ned something easier. I've done a lot of research on both 4s and 2s and feel like a 4 just better fits my needs. Please someone help I want to get this show on the road haha