had same problem with our 125 maruader, i know this is a year on but. Had carb sonic cleaned ! £20> Put it back on and it goes very well, was advised to not use carb cleaner on more modern carbs, only problem now is it will not run with the choke cable inserted but if you remove it it goes just fine, no help on the choke in the manual as the Haynes does not cv carb with cable , only the ones with side mounted levers.... go figure.Any ideas....
PJ, May 2010