ItÂ’s easy to see why the TC 125 is such a big hit Start from the Top ItÂ’s easy to see why the TC 125 is such a big hit, with its lightweight chassis and a 125 cc engine equipped with power valve, hydraulic clutch and a six gear gearbox, this little 2-stroke pumps out nearly 40 horsepower and holds the record for thrills per minute. Husqvarna has been competitive in 2-stroke Motocross over the decades and the TC 125 continues this tradition.