RD350 YPVS Radiator Hose Internal Diameter Nov 13, 2016 14:42:51 GMT 1 Quote Select PostDeselect PostLink to PostMemberGive GiftBack to Top Post by downerhouse on Nov 13, 2016 14:42:51 GMT 1 Hi, does anybody know the internal diameter of any of the radiator hoses on the 31K YPVS? Mine's away at the moment, so can't measure myself. Thanks.