Hey Jay, yes is supposed to have (steel) drain plug. Like samster said, threads are prob stripped. You can prob just re-tap it and get correct plug. Don't forget filter when changing oil! I don't think ther is adj. for timing chain tensioner (spring loaded). My Honda Svc. manual shows no maintenance on it.
Al
TF03/HASPIN ACRES /BADLANDS SURVIVOR!!! -LIFE IS GOOD!!
'86 350x (latest addition)
'85 250sx-200x frt.end,350x bars,plastic tank,3"hub spacers,22x11x10 Fast-Trekkers/.190 Douglas Red Label alum. rims/PRM desert grab bar
'85 250sx(supertrap exhaust,chrome rims)
'87 200x(restored)-'85 200x-'84 200x