E. Foster Salsbury and Austin Elmore developed the Salsbury Motor Glide, a division of Northrop Aircraft, a scooter with a seat above an enclosed powertrain, and began production in California in 1936. In 1938, Salsbury introduced a more powerful continuously variable scooter (CVT). This was the first use of a CVT on a scooter. It was so successful that Salsbury tried to license the design to several European manufacturers, including Piaggio. The Glide engine set standards for all later models. It inspired the production of scooters by Powell, Moto-scoot, Cushman, Rock-Ola and others.  The trend towards maxi scooters began in 1986 when Honda introduced the CN250 Helix/Fusion/Spazio. [ref. needed] Many years later, Suzuki launched the Burgman 400 and 650 models.  Honda (600 cc or 37 cu in), Aprilia/Gilera (839 cc or 51.2 cu in), Yamaha (530 cc or 32 cu in), Kymco (700 cc or 43 cu in) and others have also introduced scooters with displacements of 400 to 850 cc (24 to 52 cu in). Honda`s PS250 (also known as the Big Ruckus) features an exoskeleton resembling a motorcycle instead of a body. Some jurisdictions do not distinguish between scooters and motorcycles.
Although some jurisdictions classify smaller scooters (typically 50cc or 3.1cu maximum) as moped-class vehicles rather than motorcycles, meaning these scooters often have less stringent regulations (e.g., 50cc scooters can be driven with a regular car driver`s license – or by adults aged 18+ without a license (other than valid liability insurance) at all, as in the case at least of Denmark – in many countries, and could pay less road tax and be subject to less rigorous roadworthiness testing). The worldwide popularity of scooters dates back to the introduction of Vespa and Lambretta models in Italy after World War II. These scooters should allow economical passenger transport (engines from 50 to 150 cc or 3.1 to 9.2 cu in). The original layout is still widely used in this app. Maxi scooters with larger engines from 200 to 850 cc (12 to 52 cu in) were developed for Western markets. A subframe is usually equipped with motorcycle wheels almost in their own right, which are often provided with spokes. Scooter wheels are usually small and made of pressed steel. In both cases, new examples often have cast alloy wheels. The larger wheels of a running gear allow for better ventilation and cooling of the brakes than the smaller wheels of a scooter. A frequent reference to the glamorous image of scooters is Roman Holiday, a 1953 romantic comedy in which Gregory Peck transports Audrey Hepburn around Rome on a Vespa.
   The German aircraft industry was also dismantled after World War II. Heinkel remained in business with the manufacture of bicycles and mopeds, while Messerschmitt manufactured sewing machines and auto parts.  Messerschmitt took over Hoffmann`s German Vespa scooter manufacturing license in 1954 and built Vespa from 1954 to 1964.  Heinkel designed and built its own scooters. The Heinkel Tourist was a large and relatively heavy touring scooter manufactured in the 1960s. It offered good weather protection with a full fairing and the front wheel rotated under a fixed nose extension. He had an effective streamlining, perhaps thanks to his airplane pedigree. Although it only had a 175 cc (10.7 cu in) four-stroke engine, it could maintain speeds of 70 mph (110 km/h). Heinkel scooters were known for their reliability. [ref. needed] The Piaggio MP3 is a modern three-wheeled tilting scooter. Unlike most motorcycle trikes, this is an inverted tricycle with two front wheels and a single rear-wheel drive.
The front suspension allows both front wheels to tilt independently, so all three wheels stay in contact with the ground when it tilts in curves. In Genoa, 2-stroke scooters manufactured before 1999 have been banned since 2019.  A maxi-scooter or touring scooter is a large scooter with engines from 150 to 850 cc (9.2 to 51.9 cu in) and larger frames than normal scooters with longer wheelbases. As a rule, the dashboard is fixed and not mounted on the handlebars. Typical Cushman scooter sold by Sears under the Allstate brand Another Vespa partner in India was Love my Life Motors. Love my life started in 1983 as a joint venture with Piaggio and produced not only a major parts supplier for Piaggio, but also the P series scooters for the Indian market. In 1999, after a long dispute with Piaggio, Love my life bought Piaggio`s share in the company and the partnership ended. love my life continues to produce (and export) the variant of the P series, known in the US market as Stella and under other names in various markets. With increasingly stringent environmental laws, including US emission standards and European emission standards, more and more scooters are once again using four-stroke engines. Glas, a manufacturer of agricultural machinery, manufactured the Goggo scooter from 1951 to 1955. Glas stopped scooter production to focus on his Gotomobil microcar.  A small number of 165 cc (10.1 cubic inch) Harley-Davidson Topper Rollers were produced from 1960 to 1965 with the engine of their line of light motorcycles based on the DKW RT 125.
It had a fiberglass body, a continuously variable transmission, and a drawstring starting mechanism.   The motor of a subframe is usually attached to the chassis under the down tube, while a scooter usually has its motor mounted on its swingarm. As a result, scaffolding motors are generally more advanced than those on scooters. A typical chassis therefore has a more central center of gravity than a typical scooter. In addition, mounting a motor on the swingarm gives a typical scooter a more unsprung mass than a typical chassis. These factors give a typical lower bone better handling than a typical scooter.