FST is crap, especially at the amounts they tell you to use, i've tried it and it's quite useless.
Some bikes suffer from it, others don't, it's the luck of the draw i think.
IF it is carb icing then i would imagine the pipes around your carb heater circuit are blocked, which are part of the coolant system to raise the temperature of the carbs to prevent icing, so ideally they need unblocking so the fluid can flow properly.
Be worth reading this as well: http://foc-u.co.uk/index.php/topic,5122....l#msg44462
Some bikes suffer from it, others don't, it's the luck of the draw i think.
IF it is carb icing then i would imagine the pipes around your carb heater circuit are blocked, which are part of the coolant system to raise the temperature of the carbs to prevent icing, so ideally they need unblocking so the fluid can flow properly.
Be worth reading this as well: http://foc-u.co.uk/index.php/topic,5122....l#msg44462
More people are born because of alcohol than will ever die from it.