Trident 900 Sprint Tank Breather Problem !

Hi all
im new to this forum and I have just bought my first triumph a 1994 trident 900 sprint.
I bought it to turn into a cafe racer but it is so nice it seems a shame so im just going to run it for a while.
problem is I have a smell of fuel around the filler cap. i read on the internet it could be the filler cap venting and to check the tank breather.
So i have emptied the tank and lifted it up to check breather at rear of tank and when i blow up it it is blocked !!
i take it this is not normal? ive tried clearing it with wire but cant seem to unblock it. is there any tips to help clear this.
many thanks
cheers dave

 

just been told this is the fuel overflow for the filler cap
which isnt draining down it seems to be blocked near the filler end.
anyone any tips to clear this out seems well blocked .tried using bicycle brake cable but doesnt seem to clear it
cheers dave

 

Cheers Joe wd40 did the trick