The two-wheeler manufacturer had sold 40,453 units in December 2015, Eicher Motors said in a BSE filing.
Exports during December jumped 160 per cent to 1,082 units compared with 416 units in December 2015.
Total sales in the domestic market during the April-December period of the ongoing fiscal was at 4,88,262 units as against 3,59,968 units in the year-ago period, up 36 per cent.
Total exports in the nine-month period grew by 78 per cent to 10,545 units from 5,943 units a year ago.