see, this gets me wondering.. as ive run 30mm carbs on allsorts with no real increase in fuel consumption.. for instance ive ridden unported nbikes back from southampton and done a tenner fuel.. thas a scorp 25mm and 172 (ye james LOL) lee rode his back from isle of white and did less fuel.. wernt takin it easy ether. fuck it, drinking fuel? its 200cc.... buy a car, wont give a FUCK how much fuel yopur bike uses