Racer X Tested: 2013 YZ125

We return to our roots this month with a classic bike that has remained largely unchanged for the past eight years: the Yamaha YZ125. What it lacks in change it makes up for in dependable performance, and it’s also the perfect platform to build a screaming two-cycle rocket. Pro Circuit Works pipe and Shorty silencer Moto Tassinari V-Force reed block Pro Circuit Valved and sprung suspension billet clutch cover