ok fellas ,just ordered me moto hooligan box with the full kit ,including the resistor and secondry butterflys, now question is in the spot on how to do it guide ive just downloaded on this site which is cock on ! copy going into garage with me , theres no mention on why or how to replace them, can you help as if its in the box of tricks surely its worth changing them, or err is it

I'm not sure from the question exactly what you are after? I am slightly dyslexic so excuse me if I'm missing the question but are you talking about the MotoFlys? If so they just allow more air through a bit quicker then the standard. So helping the engine pick up more quickly. Some have removed them altogether and had great results but I believe there is a risk of the bike bogging down on fast throttle openings. MotoFlys are meant to be a compromise. Hope that is what you were after.