Can anyone advise, as to what size the left side handlebar perch screws are ?. . These are philips head screws and I would like to change them out to something less strippable . I'm probably going to have to use vise-grips or something else to get the upper one out ( yes , I even used a JIS screw driver !.) ,it's not stripped / rounded out completely .......yet , but I want to change these out before doom sets in .