A hailstorm of acronyms describes the many "rider adaptive technologies" that distinguish the new YZF-R1 . Start with IMU, shorthand for the six-axis Inertial Measurement Unit that combines three gyro sensors—one each to monitor pitch, yaw, and roll—and three G sensors—measuring up-down, right-left, and fore-aft accelerations—to provide a 3-D picture of vehicle dynamics at all times. This IMU enables multiple Yamaha Ride Control (YRC) systems, including traction control, race ABS, launch control, wheelie control, and, for the first time ever on a production bike Yamaha says, rear-wheel slide control designed to arrest lateral tire slides that occur independent of wheelspin—technology that has only existed on the YZR-M1 MotoGP bike since 2012. The IMU analyzes incoming data 125 times per second and sends directions to the ECU, where torque is cut one of three ways: altering throttle angle, fueling, or ignition. YRC offers four global presets for one-click selection of all rider controls; each separate system can be further adjusted independently—nine levels of TC intervention, for example, or three levels of front wheel lift abatement—or they can be deactivated completely (all except for ABS). Four separate power modes further tailor throttle response and power delivery.