There has been incredible innovation and advancement when it comes to motorcycle engine design. The largest motorcycle produces including Yamaha, Honda, and Suzuki continue to put large amounts of money into research and development in order to create the top performing motorcycle engines.
The leading producers of cars will all say that the leading edge of engine technology is in motorcycles rather than automobiles or even aircraft. Often the innovations applied to motorcycle engines migrate over the car engines. Better combustion is the key to all engine development. One new strategy is to use more than four valves for each cylinder so that there is a better flow area.
The change of the motorcycle engine from the traditional two valve models to the four valve models was all geared toward creating better combustion.
When Honda first introduced the four valve engine back in the 1960s it allowed for narrow valve angles and shallow combustion chambers which was able to provide good combustion when paired with a spark plug.
As early as the 1980s Yamaha was looking beyond the four valve engine for methods of using new head and valve configurations to improve combustion. They even went so far as to experiment with seven valves per cylinder designs. These models used three valves for exhaust and four for intake.
They finally found the right configuration with five valves per cylinder. This design makes use of one extra intake valve which allows for better air flow during low to medium valve lifts.
This is the way that most engines are operated on a regular basis. One of the biggest and most advanced manufacturers of motorcycle engines in North America these days is Honda.
They have fairly recently constructed a large state of the art plant which cranks out more than half a million engines each year. They combine the most advanced manufacturing techniques with leading edge engine design to produce a premium product.
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