I just picked these two up, holy crap are they fast. Not your average PepBoys toy. They both have a stage 3 hypo kit. That is a K&N air system with risers on the carb. Tuned exhaust, restricters removed and a timing key installed that advances the timing by 10* My son is a 200 pounder and the blue one will lift the front wheel off the ground at take off. It will also climb to almost 55mph. The faster it goes the more the front end comes up. You end up laying across the bars to keep it down. The green one smokes it off the line but only tops out at around 40 mph. I was woundering if anyone here has one of these little rockets that have been souped, and would you share what has been done. Of course your post isn't any good without a picture. Hell I'm almost 60 years old and these things are a blast to ride.