Royal Enfield posted a sale of 77,878 motorcycles in the month of January 2018, a growth of 31% over the same period last year. The company sold 76,205 units in the domestic market in January 2018, as compared to 58,133 units for the same period last year. International sales were at 1,673 units in January, against 1,543 units in the year-ago month.