after changing my needles to Truxton needles i gained much better performance than stock ,throttle response was much better and the speedo needle climbed over those numbers much faster than before.
My setup is
125 mains (but needs more like 130s or 135s)
45 pilots
thruxton needles(with 1 shim)
modified stock airbox
modified stock pipes
air injection removed
just installed 18 tooth sprocket (makes a big differance on the open road)
