Yep, Hero Honda in India is coming up with this heroic achievement.
From their website
http://www.herohonda.com/co_corporate_profile.htm :
"Hero Honda Motors Ltd. is the world's largest manufacturer of two – wheelers, based in India.
The company is a joint venture between India's Hero Group and Honda Motor Company, Japan that began in 1984.
In 2001, the company achieved the coveted position of being the largest two-wheeler manufacturing company in India and the ‘World No.1’ two-wheeler company in terms of unit volume sales in a calendar year by a single company. Hero Honda has retained that coveted position till date."
Seems like they're selling streetbikes from 100 to 150cc, the smaller engines looking like Honda Wave engines, in Tiger Boxer-looking bikes with more or less plastic. All engines are simple air-cooled two-valvers, FI is being introduced.
All in all about 14 different models of small, light, economical, reliable and cheap street bikes available, plus one scooter. Sadly no Enduro, supermoto or big scooter.
Hero Honda seems to be booming, selling appr. 1.2 Mio bikes per quarter (!), the last quarter being the highest sales volume, and there's no slowing down.