2013 KAWASAKI KLXa??140L, Stretching the Envelope of Fun and Adventure If the standard KLX140 with its 17-inch front and 14-inch rear wheels holds appeal for both young and old, the KLX140L incorporates all of its many features, yet packages them in a slightly beefier version, giving taller riders something to crow about. The 19-inch front and 16-inch rear wheels on the L-version are only part of the story, as its also equipped with a more performance-oriented, reservoir-type shock that the larger, more experienced rider will quickly appreciate.