I have heard the material quality of Bajaj bikes is poor compared to other companies. Is it so?

It's not basically the material quality, but Bajaj bikes are mostly over powered than the segment competition. The hike in power requires more precision in its manufacturing and that is the point where Bajaj lacks. Its built quality for some models have shattered its high performance image in the market. Its new products are made with more care and deliver better performance and quality.