Now have the oils, and when filling the primary chaincase it's dripping and the fuel tap plungers are leaking also , wondering which gaskets people recommend , have seen nitrile and paper ones, not sure which to get , also have seen replacement plungers , the quality seem questionable would like to repair but have to buy the brass part that peens over to put new corks on and no cheaper than buying the whole plunger . Advice welcome.