So, I planned on buying the bike, then ordering the engine a few months later. I had a change of mind, and figured why wait? So I'm about to order the kit probably on Wednesday, the 10th. I plan on ordering a 66cc kit, but I'm stuck between a few. I mainly wanted to know the difference between them. I'm ordering probably from the same company, and haven't contacted them yet. Please help. Should I get the GRUBEE SkyHawk GT5 66cc/80cc Angle Fire Slant Head Bike Motor Kit. GRUBEE SkyHawk GT5 66cc/80cc Slant Head Bike Motor Kit (Standard Finish) or should I get the Jet 66cc/80cc, Standard Finish Jet 80cc 2 Stroke Bicycle Motor - Jet 80cc 2 Stroke Bicycle Engine Kit - 66cc Bicycle Engine Kit or the Silver Slant 66cc/80cc Silver Slant 80cc 2 Stroke Bicycle Motor - Silver Slant 80cc 2 Stroke Bicycle Engine Kit - 66cc Bicycle Engine Kit There is also a Silver Flying Horse 66cc/80cc Bicycle Engine Kits Silver Flying Horse 66cc/80cc Bike Motor Kit - Silver Flying Horse 66cc/80cc Motorized Bicycle Motor Kits I have heard good things about the 80cc Raw Motor Bicycle Engine Kit 80cc Raw Bike Motor Kit EPA Certified - 80cc Raw Motorized Bicycle Motor Kits EPA Certified It's listed as discontinued, but still on their page. I have done a lot of research, and I know that they are basically the same. But any negatives on either of these? I'm not looking to do 40MPH, Don't care if I go over 30. I'm 5ft 10 and 185, and I just want to go around my neighborhood without taking the big motorcycle out. Let me know what you guys think. Thank you in advance.