Fans of vintage styled bikes could see more Royal Enfield motorcycles on American roads thanks to athe two-wheeled manufacturer planning to double its productions numbers.

Royal Enfield Motors, manufacturer the iconic Bullet motorcycle line and the world's oldest motorcycle brand has announced the construction of a new manufacturing facility.

The company says the new factory is ‘to help the company meet worldwide demand for its iconic motorcycles’.

Once completed, the new plant will more than double Royal Enfield’s current capacity of 70,000 units per year to 150,000 units per year. The new plant will be equipped to produce the full range of Royal Enfield motorcycles and allow the company to keep up with the brand’s rising popularity, both in the booming Indian domestic market and in fast-growing export markets like the United States.

Its reportedly in the Unbited States where Royal Enfield’s improved engine design and vintage aesthetics has been making a big splash with consumers.

Reportedly, demand for the vintage-inspired Royal Enfield Bullet motorcycle line has been growing sharply in the United States and world-wide since the introduction of Royal Enfield's unit construction engine two years ago, which brought new levels of performance, user-friendliness, and reliability to the world's oldest motorcycle brand.

Its first motorcycle was manufactured in 1912 by a division of the British Royal Small Arms Factory under the name of Royal Enfield. The small arms heritage was seen in the company’s logo of a cannon and their motto "Made like a gun, goes like a bullet".

As ownership of the company changed hands, the brand enjoyed success in India with Enfield of India assembling Bullet motorcycles under license in 1956 and manufacturing complete motorcycles by 1962. Even after production ceased in Britain in 1970 Enfield of India bought the rights to use the Royal Enfield name in 1995. Royal Enfield production, based in Chennai, continues and Royal Enfield is now the oldest motorcycle brand in the world still in production with the Bullet model enjoying the longest motorcycle production run of all time.

The old brand got a new and famous thumbs up recently when world-famous comedian and host of NBC’s Tonight Show, Jay Leno gave its G5 model a rave review from the floor of the Big Dog Garage.

‘Comfortable riding position,’ Leno noted during the ride and compares the motorcycle’s performance to his 1958 BSA Goldstar . After taking the motorcycles out onto the street of Los Angeles, Leno admitted he likes the classic feel of these types of motorcycles and pointed out that riding a Royal Enfield is a ‘whole different mindset’.

Leno was very impressed by the smoothness of the ride, even at higher, highway speeds commenting that the Royal Enfield was a ‘real quality product.’

And Royal Enfield are obviously hoping more riders will want to enjoy that quality product with their new plant increasing the company’s production numbers. The new factory will spread across 50 acres in Chennai’s SIPCOT Industrial Growth Centre and is slated for completion by the first quarter of 2013.

“We’re very pleased with the growth we’ve seen in recent years. Royal Enfield has made incredible imrpovements its product design and consumers in the U.S. and elsewhere are really beginning to take notice,” commented Kevin Mahoney, President of Royal Enfield USA. “Today’s announcement shows that Royal Enfield is very aware of its growing customer base and committed to meeting the expectations of consumers around the world.”