The stock fell by 5.12 per cent to Rs 2,051 on the BSE.
On the NSE, it slipped 4.66 per cent to Rs 2,053.
Bajaj Auto today reported 21 per cent decline in motorcycle sales at 2,16,077 units in February 2015.
The company had sold 2,73,323 units in year-ago period.
The two-wheeler major said in a filing to the Bombay Stock Exchange (BSE) that its exports declined by 20 per cent during the month to 1,12,909 units from 1,42,009 units in the corresponding year-ago period.