1960 ROYAL ENFIELD BULLET – A LONG HISTORY Royal Enfield introduced the 350cc and 500cc single-cylinder Bullet line in 1948, and while many changes were made in the interim, including a change of ownership of the company, the Royal Enfield Bullet has the unique distinction of being the longest-running motorcycle model still in production today. The Bullet was built in Royal Enfield’s Redditch, England factory from 1948 until the company was sold to Madras Motors of india in 1970. All production was then moved to Mumbai where Royal Enfield Bullets are still built to this day. Interestingly, they’ve changed very little. They still look very much the same way they did in 1960. All twin-cylinder production was dropped.