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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 ...
The Honda CM125 is a parallel twin cylinder air-cooled OHC four-stroke cruiser motorcycle made by Honda from 1978 to 2002. [1] It had a top speed of 65 mph (105 km/h). [2] The CM125C engine combines the single carburettor of the squat Honda CD125 Benly motor with the tall cylinder head and five-speed, gearbox of the sportier Honda 125 Super Dream.
The engine was a straight- or parallel-twin, four stroke with two valves per cylinder operated by a chain-driven overhead camshaft. The compression ratio of the C92 was 8.3:1, and the C95's was 9.7:1. Honda's claimed horsepower for the C92 was 11.5 hp (8.6 kW) @ 9,500 rpm and 16.5 hp (12.3 kW) @ 10,000 rpm for the C95.
The CG was originally manufactured in Japan, but the source for the European market was eventually moved to Brazil in 1985, and to Pakistan and Turkey in 1992 for the W and M models. The CG125 is powered by a 124 cc (7.6 cu in) four-stroke, overhead valve, single-cylinder engine that has changed little over the years.
The first generation of the Varadero 125 was released in the UK in 2001 aimed at the beginner rider market. Honda began working on a larger 125 motorcycle after the 15 metric horsepower restriction on all 125 cc motorcycles, with a marketing study suggesting that riders involved in this market were attracted by the idea of what Honda called a dual-sport motorcycle, [1] which benefited from a ...
The Derbi GPR 125 is a street motorcycle sold by Derbi - Nacional Motor since 2005. [2] The original GPR125 was powered by a single-cylinder two-stroke engine with a steel lined cast iron cylinder manufactured by Yamaha, but was superseded in 2010 by an all-new DOHC four-stroke four-valve model.
The Aprilia RS4 125 (sold as the RS125 since 2016) [1] is a 125 cc class sportbike manufactured by Italian motorcycle firm Aprilia.The four-stroke RS4 125 replaces the extremely popular RS125 two-stroke race replica in Aprilia's lineup.
A desmodromic valve is a reciprocating engine poppet valve that is positively closed by a cam and leverage system, rather than by a more conventional spring. The valves in a typical four-stroke engine allow the air/fuel mixture into the cylinder at the beginning of the cycle and exhaust spent gases at the end of the cycle. In a conventional ...