Originally Posted by motolab
Check the float needle's tip with and without magnification for a witness line where it has been contacting the seat. If one is found, the float valve either leaks or will begin leaking soon. Make sure the needle seat o-ring fits snugly and is not cracked/hardened/deformed/shrunken/otherwise damaged. Also make sure that the float itself doesn't leak, i.e. that there's no fuel inside the two chambers. You can either hold it up to a light, in which case it should be evident if there's fuel inside, or you can put it in a container of liquid and see if one side sinks more than the other.
How many miles/km are there on the carb?
Thanks Derek, there is 17000k's on the carb but did put a 146 needle in about 6000k's ago, it all looked fine then but was a while ago so will pull it down and do what you suggested. since turning off the tap the smell of fuel has now gone.
I am off on a 3 day ride tomorrow so this should test it out and then will pull it down next weekend.