Hello all. Quick question on swing arm. Recently purchased a ‘71 750 in need of some sorting. While inspecting the bike I noticed the rhs swingarm cap is loose and can be slid over to expose grease (and dirt). There is no play in the swing arm, so I was contemplating trying to clean out the grease, replace the o-ring seals and fill with recommended 140 wt according to some other posts on the site here. Is it possible to replace the o-rings without removing the swing arm, particularly the lhs which is a very tight fit. Can’t see it or get fingers in behind the z plate. Thanks!