2014 Yamaha SRX120 SRX 120 is a great sled to teach your young Yamaha snowmobilers the ropes of the sport. Built tough with an ultra-reliable Yamaha 4-stroke engine under the hood, the SRX 120 is sure to bring years of smiles to the snow. With color and graphics developed at the same design house as Dad's Yamaha, the SRX 120 will be right at home in the family fleet. Features include tether switch, emergency switch, whip flag and speed governor (max eight mph).