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The GY6 engine design is a four-stroke single-cylinder in a near-horizontal orientation that is used on a number of small motorcycles or scooters made in Taiwan, China, and other southeast Asian countries. It has since become a generic technology.
A maxi-scooter [70] or touring scooter [71] is a large scooter, with engines ranging in size from 150 to 850 cc (9.2 to 51.9 cu in), and using larger frames than normal scooters with longer wheelbases. Typically, the dash is fixed & is not mounted on the handlebars.
A transverse engine is an engine mounted in a vehicle so that the engine's crankshaft axis is perpendicular to the direction of travel. In a longitudinal engine configuration, the engine's crankshaft axis is parallel with the direction of travel. However, the description of the orientation of "V" and "flat" motorcycle engines differs from this ...
On this engine, the engine delivers a maximum torque of 3.3 Nm at 6250 rpm and a power of 2.4 Kw at 7000 rpm. The braking system consists of a 220 mm front disc with a double piston caliper and a 140 mm rear drum. [8] [9] Only version 50 is imported on the European market, replacing the previous one Aprilia SR Max released production in 2020.
Unlike most scooters with enclosed engines, the Topper's engine did not have a cooling fan. [2] [5] [6] It was expected that the low, horizontally mounted engine would be cooled by air passing under the scooter, [2] but some Toppers developed overheating problems. [5] The engine used a reed valve in its induction system. [3]
The Bajaj Chetak is a motor scooter produced by the Indian company Bajaj Auto.Past models were petrol powered (either 2 or 4-stroke). The modern version is electric (known as the Chetak Electric), and is powered by a 4.2 kW BLDC motor with a 2.89 kWh lithium-ion battery pack, [2] and comes with a 90 km range.
When it was introduced, the 500cc TMAX engine was the largest (and most powerful) ever used in a production scooter. [16] Yamaha enlarged the engine to 530cc for 2012 and subsequent models. The most recent TMAX redesign, with the model designation XP530, is for the 2017 model year.
Introduced in 1992, more than 800,000 units have been sold, bucking the trend for less use of two-stroke engines.Aprilia claims several firsts for the SR50 in the scooter market, including 13 inch wheels, liquid cooling, double disc braking, and a direct injection engine.