Greg,
I just had a look around my bike. There doesn't seem to be any easy way to get to the breather assembly, but perhaps removing the rear mudguard might be a possibility. Its 4 years since I put mine together so I can't remember much about putting the guard on but the plastic part sits right behind the breather. The airbox, though, has a heap of stuff to come off before ite can be moved, - including the plastic chamber between it and the carbs which can be a pain to get back in place.
Good luck,
Justin