ok, so now i'm getting pissed off. damn bike, been garaged for 2 weeks while away on hols. did a couple of short runs wed/thursday. running great after all the recent problems with back tyrewheel etc. half way to work last night (about 10 miles) bike started to splutter as though it was running out of fuel, the more revs it got the worse the splutter, the higher gear the better. i know i had plenty in, but still put it onto reserve. made no difference at all. i continued to splutter along the A1 until i got to work. bike was left outside overnight and again this morning i had same problem. though it might be bad fuel, so put a tenners worth in, still same problem. took it to bike shop who said it was cold carburettor causing this that and other (to much physics for me), told me to get something called pro fst, but no one and i mean no one inc halfords and motor discount centre has heard of it. but one bike shop told me to try nitrox hot shot. so i have put that in. only done 2 miles since, so will have to wait a bit to see if it makes any difference. the float chamber has been drained, plenty of fuel coming out, changed plug. any ideas guys. tbh i'm getting sick of the continuous problems with this bike. not so much a joy at the mo.