Abstract
In many developing countries, motorcycles and tricycle are increasingly becoming the common means of transport especially among low-income urban dwellers (urban poor) and many rural people. The high ownership and use of motorcycle in the urban areas in eastern Nigeria has come with its accompanying challenges like motorcycle accidents involving fatalities environmental and public health concerns from the emissions non-compliance to motor traffic regulations for instance helmet use is generally low in this region all of this which make a tricycle a more comfortable and affordable for commuter. The high incidence of tricycle ownership and use has also been contributing significantly to the betterment of many livelihoods of urban residents in Nigeria as a whole and at the instance Imo State for example. The increasing growth in the number of tricycles has come to solve the mobility needs of many urban residents in the light of poor and inadequate public transport system, poor road conditions particularly those leading into the peri- urban areas where many people reside as a result of urban sprawl. It also comes along with a host of opportunities including employment to tricycle mechanics and tricycle spare parts dealers, local revenue generating sources through taxes/levies on tricycle owners/riders as well as tricycle registration and licensing. The tricycle comprises body layout, front and rear longitudinal members, main floor unit, engine position, wheel bases, luggage space, the rear seat panel, boot floor, rear bumper, electrical and lighting system, chassis, ignition system, handle bar, fuel tank, brake and gear selector, engine access booth, two side mirrors, back and front tires, exhaust pipe and adjustable seat. Some of this which are not detail explain in this course of the work rather the paper work focuses on the Engine design layout and operation cycle of the engine, designs parameters (calculations) with engine parts and their major functions