I've had endless amounts of pitbikes not the Chinese Shite and even still if it don't break you get bored, I got a ktm sx125 and love it to bits, touch wood it's not gone wrong yet, and reason I use 125 Its light and starts easy when your warn out and still keeps up with bigger bikes, I've just done a enduro and most the 4 stroke riders where either stalling and can't start or having trouble on the boggy hills(not shore why though)