Pulling up beside another rider and unexpectedly getting challenged to a 400-metre sprint is a neat little touch. You can be minding your own business one moment and racing for coins the next. The bikes have a mischievous streak, too; twist the throttle too eagerly and the front wheel may lift when you least want it to. This modified version comes with unlimited money unlocked, so you can buy bikes and fiddle with rims, exhausts, and bodywork without grinding through races for cash. The 201-metre strip is good for quick contests, the longer runs let you chase top speed, and free-roaming around the city makes a welcome change when you've had enough of racing.