hi mate ater stripping and rebuilding the carb it started first time on the button, its a 28mm mikuni the slide is box shaped,the side is flat,the mixture screw turned in 1 and a 1/2 turns so set it to that on rebuilding as for the clip groove I couldnt get to it what a pain in the arse the slide has like a yellow plastic clip inside which I coulnt move so didnt bother as for the servo it seems ok and moves at the right time ,when riding it still burbles at about 5.5 6000 revs ,and when backing the throttle off it potters at lower revs definatly think it is a carb prob as for the manual the new TDR125 have the same engines I think,anyways it runs.I should be thankfull for that and some nice weather cheers,ayron