The right size dirt bike for growing youth and youthful adultsThe days of settling for cramped ergonomics and limited performance aboard simple one-sized machines are over. With its 19 inch front and 16 inch rear wheels and advanced rear shock, Kawasaki�s KLX� 140L dirt bike is the ideal match for more experienced or longer-limbed fans of small displacement off-road machines. Its more elementary sibling; the 17 inch front and 14 inch rear KLX140, is a first-rate option for novices and smaller riders.