How a dirt bike engine works depends on whether it’s a two stroke cycle engine vs a four stroke cycle engine. For example, one stroke in two produces power on a two stroke; whereas one stroke in four produces power in a four stroke. But the basic components of both engine types are similar, as they are both internal combustion engines. They both have pistons, cylinder block and head, fuel inlets and exhaust outlets (although these operate differently) and a crankshaft. The lateral movement or up and down motion of the piston is converted into a rotary movement in the crankshaft in both engines.
A 4 stroke dirt bike engine works on a principle of four strokes or four cycles of a piston. There are two upward strokes and two downward strokes that make up the four strokes. These four strokes are called the intake stroke, the compression stroke, the combustion stroke and the exhaust stroke. On the intake stroke, the intake or fuel valves are opened to let an air-fuel mix into the combustion chamber. On the exhaust stroke, the exhaust valves are opened to let out the burnt fuel or exhaust created from the combusted fuel
A 2-stroke dirt bike engine works on two strokes or cycles of a piston. On one of the two strokes, the air-fuel mix is drawn into the combustion chamber via the transfer port from the crankcase. As the piston nears the top of the combustion chamber the spark plug ignites the air-fuel mix. This combustion creates high pressure, which forces the piston down on the second of the two strokes. As the piston rose during the first stroke, this reduced the air pressure in the crankcase. This reduced pressure draws in more air and fuel mix, in preparation for the next cycle or stroke. This process starts over again to start the first of the two strokes once more.
The mechanics behind how a dirt bike clutch works are simple yet clever. A clutch works on the principle of friction plates that are designed to both slip and grip. These plates grip when the are compressed together by the clutch springs. But then they slip when they are separated when the clutch lever is pulled in. The clutch is the mechanism that sits between the engine’s power and the gearbox. It either transfers power or disengages the power. The clutch is essential for a dirt bike to be able to come to a stop without stalling and is used for gear changes.
How to make a dirt bike street legal depends on the type of dirt bike you have and your budget. You are better off buying a dual sport version of a dirt bike in the first place, than you are spending on converting one yourself. The requirements for a street-legal dirt bike will vary from country to country and from state to state in countries like America. Most, if not all dirt bikes can be converted, but it then comes down to cost and hassle.
How to ride a dirt bike with a clutch is about practicing using the clutch lever on the left handlebar. The clutch is used for starting off and when stopped on a dirt bike. Plus it’s used for changing gear when moving along. Whilst you can shift gears without using a clutch on a dirt bike, I always recommend to use the clutch to preserve the gearbox’s life.