Professionals on outdoor tracks-especially 125cc European Grand Prix bikes-use engines that are almost all high-rpm power. With tuning, you can change your motorcycle's powerband to somewhere between one of these extremes. Most riders can see faster times or just have more fun with more low-end and midrange.
It is easy to use, and gives the rider confidence. Supercross and enduro riders favor this kind of power. Such an engine will have plenty of power down low, a beefy midrange, and a flat top-end. Expert outdoor riders tend to use engines tuned for high-rpm power.Īn engine can also be tuned for low-end and midrange. This kind of power can put you out front in the straits, but it is harder to control and will tire out the rider more quickly. The midrange and high-rpm bike will have little or no low-end, hit explosively in the midrange, and have an abundance of top-end power that can be over-revved.
The engine can be tuned for midrange and high-rpm power or for low-end and midrange power. Enjoyīy making changes in engine components, nearly every Japanese dirt bike has the potential for two types of power. It goes into detail on porting as well as related mods and their impact on performance. This is an article Eric Gorr posted on his website ( ) a few years back.
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