Agresive live cam
A cam with a longer intake duration will reduce static compression pressure at low speed which in turn will tend to reduce low RPM torque.But with a longer duration cam and a higher compression ratio, power at middle and high speeds will be increased which is what you wanted all along.
For an engine with a cam properly matched to the displacement and compression ratio, the net result will be more power at middle and higher engine speeds.While bigger cams may have a higher peak horsepower, more conservative cams may feel stronger to a street rider because the max torque occurs at lower RPM.Changing cams is the easy way to more torque in the 2000-4000 RPM range.Primary application: Is the bike going to be used for all around street riding or is the goal to have an engine which is running at the maximum torque and horse power for track or drag racing? Type of riding: Do you spend a lot of your time riding two up on highway trips or is it more important to have the most power you can get.
In other words is your riding style conservative or aggressive? Engine/Bike combination: This question relates to displacement (cubic inches), compression ratio, bike weight and what kind of cylinder head modifications have been done.But it's also important that you determine the underlying reason for the aggression.