NZ,that snorkle you posted is from CAL smog emision cars,inside the tank there is a small inner tank that Id say holds about two litres in volume,from either corner of the tank inside are small breather pipes that go to the small tank then up to that snorkle and some where in up there a fifth pipe comes out to the front rite hand guard with a flexible line to the breather cap on the rite hand valve cover,that is why some breather caps have three pipes and some only have two,hope this helps.