Yamaha breather pipe fuel leak

[Jason D]

I recently bought my first motorbike a Yamaha XT125 R 2006 plate. Now ever since i have had this bike it has been dripping fuel from the carb breather pipe. Not a massive amount about 1/4 inch over two days in a normal 1 litre drinks bottle. Now the bike shop I spoke to said it needed a complete carb clean and possibley a new fuel vacuum tap. So I took it in and that is what they did. Well after a 24hr period it started dripping again. I spoke to the shop again and they said take it back and they would restrip it. Which they did and for a few hours it didn't leak so I went and filled up and within 24hrs its dripping from the carb breather pipe again. The bike shop seems stumped and said the only other thing they could do would be to replace the needle.
Looking for some advice here really as to what it may be. Don't want to be taken for a ride, if you excuse the pun, with this shop. Any ideas anyone?

[Shinigami]

to be fair those are the 2 things I would have had a go at first...following from that i'm also not sure, possible air leak? no idea..



...yes i'm very helpful
____________________
Current: Honda City Fly CLR125 2003 Honda CB600F Hornet 2008 Yamaha FZ6 S2 + 1991 Kawasaki GPZ500
"Once you realize what a joke everything is, being the Comedian is the only thing that makes sense.

[Islander]

Get them to check the float height and the float needle valve.