Coolant hose internal diameter Feb 25, 2017 14:30:37 GMT 1 via mobile Quote Select PostDeselect PostLink to PostMemberGive GiftBack to Top Post by downerhouse on Feb 25, 2017 14:30:37 GMT 1 Hello. Does anybody know the Internal diameter of the coolant hose on a YPVS please? Could somebody kindly measure it for me if you have your bike in bits?Thanks a lot. Steve