Blowby Gas Recycling
Most four-stroke motorcycle engines are fitted with a crankcase breathing system. These systems are required to moderate the pressure within the crankcase and to offset the volume variations caused by the normal movement of the piston(s). It is important to note that modern crankcase breathing systems allow combustion blowby gases to escape from the engine [...]
Read More...Backbone Frame
Motorcycles with a backbone frame use the engine as a stressed member. The backbone can be tubular or stamped steel or aluminum, and even carbon fiber is used in some exotic applications. The engine is suspended below the frame and adds rigidity and strength, allowing the frame to be smaller and lighter.
Read More...