基本型兩缸發(fā)動(dòng)機(jī)

Compared with V-twin engines and flat-twin engines, straight-twi are more compact, a simpler design and cheaper to produce. Straight-twin engines can be prone to vibration, either because of the irregular firing interval present in 180° crank engines or the large uncountered reciprocating mass in 360° crank engines. Inline-twi also suffer further from toional torque reactio and vibration.