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Honda Engines

Overhead Valve (OHV) Engines

Overhead Valve
With the OHV design, the valves are located above the combustion chamber.

As the name implies, Overhead Valve engines (OHV) have the valves located above the combustion chamber, in the cylinder head.

The OHV layout permits

  • smoother fuel mixture intake,
  • quicker and more complete exhaust.

The increased combustion efficiency enables a higher compression ratio to be used. This makes it possible to obtain a greater power output and to avoid the build-up of carbon.

The OHV-design gives also an excellent thermal balance, which contributes to:

  • Reduced cylinder distortion,
  • Improved emissions performance,
  • Deceased oil consumption and
  • Increased engine service life.