On Tv i have seen many of the guys on 125's and 250's that look no taller than me (im about 5'6) but they sit almost flat footed on the bike. But when i go to sit on a big bike, both of my toes just touch the ground. Do they lower the seat height and how do they do it, are there different ways, beacuse im planning on buying a new bike this summer(125 or 250f), so I would like to know. thanks.