The Cross Country Lineup: 4-Stroke, 2-Stroke, Your Choice.Yamaha features a full line of cross country race weapons to help propel you into the victory zone. From the 4-stroke YZ450FX and YZ250FX with electric start and the Yamaha exclusive smartphone power tuner app that lets you adjust your bike’s settings. To the 2-stroke YZ250X and YZ125X for unmatched, lightweight performance in tight conditions, Yamaha has the YZ cross country race machine for you to blast the competition. SUBSCRIBE to "Yamaha Motor USA" on YouTube: Follow us on: Instagram Twitter Facebook Pinterest Life can have many exciting, memorable experiences. Creating opportunities for them is what Yamaha is all about.