Get checked out: Blood in the phlegm can have a lot of causes: some benign, others not as much. Especially if you are a smoker, any blood in the phlegm is not normal. The best thing is to see your doctor: get the blood in the phlegm and the pain in the kidneys checked out.
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.
The steam-engine motorcycle was invented in 1867. This coal-powered steam engine was invented by Sylvester Howard Roper, an American inventor. The steam-engine motorcycle ran on two cylinders. Now a few years later the first petroleum gas-powered engine motorcycle was invented in 1885 by Gottlieb Daimler. This motorcycle used a Four-Stroke Internal-Combustion Engine which was invented in 1876. This is a bookmark in history since was the first real practical application of combining a practical gas engine with a bicycle.