There have been many engine designs over the years, from sleeve valve to Rotary, but only two designs have endured; pushrod engines and overhead camshaft engines. *Billed as $4 plus GST every four ...

THERE have been many engine designs over the years, from K-Cycle to Rotary, but two designs have endured; pushrod engines and overhead camshaft engines. There are advantages and disadvantages of both ...

Last month's "How It Works" story gave you the basics of the four-stroke cycle, describing the motion of the intake and exhaust valves in relation to the piston moving up and down in the cylinder.