The Harley-Davidson 1200 Sportster Custom and the Harley-Davidson 1200 Sportster 72 are two different models of the Sportster line, and while they share certain similarities, there can be variations in fuel efficiency (miles per gallon or MPG) between different models and configurations.
Generally, fuel efficiency can depend on various factors such as riding style, road conditions, maintenance, and modifications made to the motorcycle. However, both models typically have similar engine sizes and fuel systems, which can provide a reasonable basis for comparison.
The Sportster line of motorcycles, including the 1200 Sportster Custom and 1200 Sportster 72, typically feature a V-twin engine with an approximate displacement of 1,202cc (1200cc) and utilize a carburetor or electronic fuel injection system.
Considering these similarities, it's reasonable to expect that the MPG performance of the 1200 Sportster Custom and the 1200 Sportster 72 would be comparable. However, the exact MPG can vary depending on riding conditions and other factors.
To obtain accurate and specific information about the fuel efficiency of these motorcycles, it's recommended to consult the official specifications provided by Harley-Davidson or reach out to a Harley-Davidson dealership for the most up-to-date and accurate data regarding MPG figures for these specific models.