I ride a ttr125 on the pitbike track a few times a weak. Just got in from a hardcore session...my knees hurt like hell from hitting the bars but yes I am a bigger mini rider....along with 50s. Im 5 11 to 6 feet but and 150.
Yeah I'm Big... 5'11 235 my 12 year old son has the power to weight advantage for sure!! Bu the more I ride the better I try to eat, so it is worth it.