A flat-4 engine has 4 cylinders arranged within an reverse direction alongside a standard crankshaft. The pistons shift away from one another at the same time. Examples are Honda CB750 and BMW K1200RS. Sprocket or cog: wheel with teeth that meshes with the chain; one of several wheels inside the https://pit-bike-engines06050.thenerdsblog.com/40905649/engine-bike-kit-no-further-a-mystery