[1] In 1953, the US export market led Royal Enfield to develop a 692 cc, overhead valve twin capable of 100 mph (160 km/h), which was launched as the Meteor.

The engine was basically a modified 500 twin crankcase with 350 single (Bullet) pistons, valves and identical 90mm stroke length.

In 1954, the Super Meteor was updated and fitted with a new cast alloy headlight nacelle (casquette) housing the speedometer, ammeter and light switch.

Based on the Royal Enfield Meteor Minor 496 cc overhead valve engine, the new model had a strengthened crank and improved clutch.

Royal Enfield's Technical Director at the time, Tony Wilson-Jones, saw little future in the system and it was not put into production by the company.