The Yerf-Dog has nicer handling suspension but it is more prone to damage since the front wheels stick out past the frame/nose. I prefer this design since it allows for steeper approaches without digging the nose into the ground or hillside. The Yerf-Dog has more room than the other buggy allowing your son to grow to 6' or more and still fit. The plastic seats are a mixed blessing - They are easy to clean and hard to damage but are not as comfortable as a padded model. The Yerf-Dog has no reverse and only a rear brake. These can be added later but will easily double what you want to pay for a buggy.
[b]2006 Tank Urban Touring 150SE[/b]
6" intake plenum, 1.5" UNI filter, K&N precharger, 130 main jet, NGK Iridium IX CR7HIX spark plug, MRP yellow adjustable CDI, Orange high output coil, 14Ah sealed battery, 2000 RPM red torque spring, Koso 115mm variator, Dr Pulley 12g sliders