Riding around Rajasthan on a motorcycle is like being dropped into a period drama, where the architecture, the people, the customs and the landscape look very much like they did a hundred years ago. Royal Enfield&rsquos Classic 500 is a rather convincing retro motorcycle too, in the way it looks at least. But it&rsquos also a modern electronic fuel-injected machine launched in late 2009 that carries on the spirit of the original. Two new variants of the Classic 500 were revealed recently at The Serai, an elegant and luxurious tented camp, cleverly tucked away in the scrublands, thirty kilometres outside Jaisalmer.