| Its the same principle behind bonnet scoops on high performance cars and turbos.
In simple terms if you provide intake pressure of air and fuel you get a bigger combustion explosion and higher power output from the engine.
By facing the Carb and air filter forward the movement of the bike will act like a very mini turb, particularly at speed. And hence the reason why a foam uni filter is better then the convoluted paper and mesh filter which have a solid end. The solid end would block the best area for intake pressure.
It may at best add about 1 hp at top med to high speed, although i have not read of any measurements.
When your dealing with 70-90kg pilots , 60-70kg bikes and engines with only 8+ hp then every little bit helps. |