Works by controlling the air stream after the slide
Works at the lower throttle openings (idle to 1/2 open). Air is forced to fill the cylinder in the shortest time making the most power at lower throttle openings
98-06 40mm CV Keihin Carb 88 Evolution Engines
Great bike...went from DRZ400e to smaller but great woods bike. Even held its own at Glamis, Imperial sand dunes. Smooth power for offroad, and after air/fuel upgrades even smoother and more responsive. Easier to start too!