nonononononononoonono yes....
Mines been changed...twice. Is it a new one (06 or 07)?? If it's a bit older rip the valve out. Mine ran without it in for two weeks. If it's under warrenty then tell them to take it out run it for a couple of weeks to make sure that is the problem, and it gives them a chance to get the part in - UNDER WARRENTY. My dealer says that Triumph know there's a bit of a problem with them.
It could be however that the breather pipe is trapped. check that first.
Gina
03 America - Pretty stock - except the TBS wheel...

06 America - missing, presumed in bits. With it's TBS wheel...

09 America - It's very blue....