well i know with mine i took it apart and cleaned it etc and setting the rpm to 900 but as soon as u plug it back on it revs to just shy of 2k rpm and doenst budge!!! any ideas james?! like i said earlier needs another chip to sort the hesitation out (spoke to julian godfreys about it as its their chip and it was for standard head not ported) but the idle thing is a pain in the arse as ive had to use it for work at the mo and i cant sit there holding the rpm from stalling it with the throttle as it annoys the neighbours