Two stroke v/s Four stroke Used Motorcycle Engine

Nearly all combustion engines work in the same way, and used motorcycle engines use this technology. There is a small area known as the cylinder, which is shaped something like a drinking glass. Within each cylinder is a piston, which moves up and down in the cylinder. The piston is attached to the crankshaft, and as the piston moves up and down, it turns the crankshaft. This causes the overall structure to produce work. So, if a crankshaft is attached to a motorcycle transmission with wheels on it, then it causes the wheels to spin.

Essentially, the difference between two stroke vs. four stroke motorcycles has to do with the number of steps involved in the overall process. Both of them must take gas into the cylinder (intake), which is then compressed into a small space of the cylinder above the piston (compression). This compressed mixture is ignited by a spark plug (combustion) - causing the piston and crankshaft to move. Lastly, the burnt leftovers must be expelled from the cylinder so that more explosions can take place (exhaust).

Two stroke engines perform the entire process in two steps, so that intake and compression occur every time the piston moves up, and combustion and exhaust occur every time they move down. Four stroke engines complete the process in four steps: the piston moves down and pulls in the fuel/oil mixture (intake), it moves up and compresses the mixture (compression), it then ignites and moves down (combustion), and lastly moves up again, expelling what is left (exhaust).

Motorcycles have used both two stroke and four stroke engines, and they both have different qualities. Two stroke used motorcycle engines are typically cheaper to manufacture because they have less moving parts. They also have a higher power-to-weight ratio, which makes them attractive in sport bikes. The downside is that they require a special mixture of fuel and oil which is usually more expensive. Furthermore, the combination of this mixture with the two stroke process yields pollution that has a greater toxicity than that produced by the four stroke engines.

For several reasons, two stroke motorcycles are being phased out. Despite typically having worse power-to-weight ratios, more research has been put into four stroke engines, and this has yielded better and lighter technology that enables it to compete with the two stroke motorcycles. Furthermore, as gas prices and environmental consciousness continue to rise, the downsides of two stroke motorcycle engines are quickly beginning to make them an outdated technology.

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Motorcycles have been around for more than ten decades. During this time, motorcycle engines have developed through tweaking and reworking items to get the best performance. There have been more than one dozen engines, but some never met with success. Cost efficiency and customer satisfaction brought failure to a number of used motorcycle engines.

All motorcycle engines are fueled by gasoline. To best understand engine types, it is important to understand how an engine works.

A pole called a rod cranks inside the engine and creates a draft that pulls both gasoline and air into a chamber called the cylinder. Inside the cylinder, a piston and rod quickly move up to push the gasoline and air into a smaller space where it meets the spark plug. The spark plug produces a spark between its two metal pieces.

Once the spark plug gives off a spark, the gasoline and air explode. This pushes the piston down, which in turn drives the belt or chain. This action is called torque. The movement of the belt or chain causes the rear wheel of the motorcycle to revolve. A motorcycle's performance is determined by how many cylinders are inside the engine and how they are arranged.

Single cylinder engine:

A single cylinder engine has one cylinder and one piston. Single cylinder engines are used in all off road motorcycles. The single cylinder provides a lot of torque, but also a load of vibration. The vibration is loud and one of the qualities that dirt bike race fans crave during a race.

Twin cylinder engine:

Logically, twin cylinder engines have two cylinders. The cylinders are placed together at an angle. Usually the cylinders are positioned at a 90 degree angle, but there are exclusions to that standard. A twin cylinder engine produces more power because there is more torque and more fuel used. Twin cylinder engines do not vibrate as much as a single cylinder engine.

Now, as stated above, there are exceptions. The boxed or boxer design finds cylinders placed side by side. This produces even less vibration, but adds a new issue. The cylinders tend to jut out the side of the bike, which makes it hard to take sharp corners. Another issue is the tremendous heat that the cylinders project; it makes leg protection a necessary evil.

Triple Cylinder Engines

A three cylinder engine finds the cylinders included in a head. This type of engine offers a load of power, but it also requires more parts. Each cylinder requires an additional fuel injector and carburetor. The more cylinders included on an engine, the higher the engine RPM. More RPM means more power. Triumph makes motorcycles using three cylinders and boy can they fly!

Four Cylinder Engines

The four cylinder engine is just like the three cylinder engine only it has the additional cylinder and therefore weighs more. As is true of any engine, more cylinders equal more power and smoother sailing.

It is important to consider how much size and power you require in your motorcycle. If you are taking your bike off road, you need a bike with plenty of torque and a low rpm to make it up hills and quickly navigate corners. For off roading, stick with a single cylinder. A double cylinder is your second choice.

If your main purpose for riding a motorcycle is riding through traffic and along roads, do not purchase a bike with less than a twin cylinder engine, although a three or four cylinder engine is a better idea.

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