Lifer, if you do decide to go with a HS 49cc from gasbike get the one with the clutch on it. Another issue is the tire size. My bike has 700c wheels and uses pretty thin tires. They tend to wear faster than say a 26x2.125 tire because of less surface area in contact with the roller. I put up with it because I love the bike and the way 700c wheels roll. That's an issue you may want to consider. Another issue is brakes, a bike that comes with front and rear brakes is better than a bike with just a coaster brake in my opinion.