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.
Power came from Yamaha's FZR1000 cooled and angled-forward cylinders, 20 valves worked by twin overhead camshafts, and capacity of 1002cc. Fuel injection, softer cams, narrower intake ports and reduced compression ratio combined to reduce peak output from I40bhp to 100bhp at 9000rpm.