hey Jon...first off...welcome...lotta guys on here waaaaay smarter than me about this stuff..hopefully they'll jump in...but first guess on the fuel is the petcock gasket is just worn out..dry, etc...on one of my much older bikes my problem was not with the petcock but the carb itself and while the old japan quality is much better, it was just easier to get a cheap china carb and swap it out with new gaskets all around and get back to riding..will rebuild the OEM carb later.
as for your transmission klunk...no clue..sorry.. I'm assuming you Rubi is elecrtic shift?
as for your transmission klunk...no clue..sorry.. I'm assuming you Rubi is elecrtic shift?