... ATV, NEW-MODEL ,2011 YEAR MODEL EEC APPROVED 50cc/70cc/90cc/110cc ATV, NEW-MODEL ,2011 YEAR MODEL 1. engine ... type :50cc/70cc/90cc/110cc,4 storke2. bore and stroke :39x41.4/47x41.4/47x49 ... 3. compression rating :8.8:1 4. max torque :4.2Nm/5000rpm , 4.2Nm/5000rpm, 5.2Nm/5000rpm, 5 ... 3. compression rating :8.8:1 4. max torque :4.2Nm/5000rpm , 4.2Nm/5000rpm, 5.2Nm/5000rpm, 5 ...