Took the fuel tank breather pipe apart, two bits of hose and the little alloy valve. Went to put it back together and not sure which way it goes! Doh. There's a little v shape arrow thing, which I guess points away from the tank. If I remove the pipe from the tank itself I can suck in but not blow through the pipe, I guess this is right as the tank needs to draw in air as the fuel level goes down? The bike runs fine, however when I open the cap after a run there's a pretty loud woosh, and it's been so long since I last rode her that I can't bl**dy remember if it used to do this or not! Please put a fool out of his misery...