Chennai-based two wheeler manufacturer TVS Motor today reported a 39% increase in motorcycle sales during August as compared to the same month last year.On the back of robust sales in motorcycles, the company's overall two-wheeler sales also rose 32% at 1,35,533 units compared to 1,03,063 units during the same month last year, a company release said.The company said its TVS StaR and Apache bikes continue to be the drivers of motorcycle sales and it is enhancing its production to meet the expected increase in demand in the festive season.