"We started the plant at usual time today but production started a bit late as there was some damage to the machines and it took some time to set them right," HMSI Senior Vice President General and Corporate Affairs Harbhajan Singh told PTI.
Workers turned up as usual for their shift timings and there was no disruption in work, he added.
"By tomorrow we expect return of complete normalcy in the plant," Singh said.
Worker sources, however, said some of the union members protested against the district administration for going after the workers.
The plant has an annual capacity of 12 lakh motorcycles and scooters.
HMSI inaugurated its fourth plant today in Gujarat with an installed capacity of 12 lakh scooters.
The company has invested 1,100 crore on the new facility. With the Gujarat plant coming on stream, the company now has a total annual production capacity of 58 lakh units.
HMSI had in the past experienced violent labour stir when in July 2005 a protest by its Gurgaon workers who were seeking higher wages and reinstatement of suspended employees turned into a major showdown after police cracked down on them. Hundreds, including protesters and some policemen, were injured in the violence.