The engine size of a motorcycle is typically expressed in cubic centimeters (cc), which is a unit of volume. To convert the engine size from cc to liters, you divide the cc value by 1000.
In this case, the motorcycle has an 1800cc engine. To convert it to liters:
1800 cc / 1000 = 1.8 liters
Therefore, the size of the engine is 1.8 liters.