Where does this wisdom come from guys?
The full Akra saves between 9 and 10 KGs weight, most of it high up on the bike. The power gain is roughtly between 8 to 10 HP and the same amount of torque throughout the rev range. That is not to be sniffed at.
Below the relative performance gain from the full Akra with Akre fuel map over stock. The graph is from Sommer KTM in Germany and are repeatable on every bike.
Slip-on cans won't bring anything near this performance gain. Yes, it's much too expensive but don't say it only works for 'a few HP'. It thansform the bike.