I've had problems with my 600R regarding starting and poor running. Some people suggested an ignition prob may be the cause but what I've also noticed is on the days when its a bag of crap, wont start, stalls when shutting off throttle, she pees petrol from the carb overflows. Could this be tank poo getting under the needle valve causing flooding? It does't happen all the while and yes, there is a fine sediment in the tank. Any suggestions? Thanks.