The Honda Gyro is a family of small, three-wheeled motorcycles sold primarily in Japan, and often used for delivery or express service. These vehicles are tilting three-wheelers. They combine a tricycle's stopped & low-speed stability with a leaning main-body for stability while turning at speed. They resemble a scooter with a small hinged rear pod containing the engine and two drive wheels. This particular variation was developed and patented by George Wallis of G. L. Wallis & Son in Surbiton, Surrey in 1966. It was first marketed in the failed BSA Ariel 3 of 1970, then licensed to Honda. Honda has built seven models with this configuration. The first Stream was introduced in 1981, followed closely by three other personal transport versions, the Joy, Just, and Road Fox. All were short-lived, but the cargo-oriented Gyro line begun in 1982 found a ready market, with all three variants still in production in 2015. These vehicles were all powered by a 49 cc two-stroke engine up until March 2008 when the two-stroke engines of Gyro X and Gyro Canopy were changed to four-stroke engines and the production of Gyro Up was discontinued. Gyro variants Honda Gyro X This first Gyro was introduced in October 1982. It has front and rear tie-down racks, small low-pressure tires combined with a limited slip differential for good performance on slick surfaces like snow and mud, and a "one push" parking brake. 135,226 were sold by May 2002. It is intended as an inexpensive vehicle. Honda's suggested retail price for the basic Gyro X in 2008 is ¥252,000, making it comparable with the simple 49cc Honda Zoomer scooter at ¥236,250. Honda's early marketing contains the Engrish acronym Great Your Recreation Original. Honda Gyro UP The Gyro UP was introduced in October 1985. It differs from the Gyro X by replacing the front and rear tie-down racks with a single heavy-duty baggage platform fixed directly to the rear engine pod, giving the appearance of a scooter pick-up truck. This platform has a rubber-mat loading area of 450 mm × 570mm that is rated for 30 kg. Honda claims it is sized for a twenty-bottle beer crate, a container that is roughly similar to the plastic milk crate common in other countries. The standard Gyro UP does not come with the roof-type fairing or box shown in the accompanying photograph. This fairing is an aftermarket modification by the company