Vmax 120+ RWHP Club - Ken-ichi Kurotani@ 128 hp
No doubt about what helps horsepower. Top contendors have a flatslide setup. Check-out the 39mm FCR's at Ken-ichi's website. Note that Ken-ichi gets his 128 hp with Over USA Type III slip-ons!!!
-dyno courtesy of Ken-ichi Kurotani