If you need a plate anyway then now's the time for sure, sorry was a bit of a hijack as I was sort of giving Beages a hint with the pic, his tensioners haven't failed but they are close to it.

sprocket shaft seal is what im saying is starting point a nick on the outer edge of the casing not picked up on last install is what i suspect, scavenge side of oil pump maybe not working as good as it should, new auto primary tensioner had moved and front corner dropped raising rear up tightening chain putting more stress on system, hence new manual adjuster going in with new chain , so my take a bit of everything, last time i thought that's still serviceable ill use it this time if in dought through it out ,it doesnt really explain the first time primary oil disappeared just replacing everything that could remotely contribute and triple check everything going in

i changed the oils in my bike about two months ago.  I caught the oil from the engine in a pan and inspected it. it was what i expected.

similar problem to me, the only thing i can suggest is do as i did on line buy a fluesent dye kit less than 30.00 it doesn't take Mutch, put some in engine and run it,check  after x amount of km the stuff shows up easily,if no migration flush  engine do again with dye in primary it doesnt take mutch to show i wasnt loosing anymore engine oil than usual but showed up everywhere in gearbox showed up on dipstick,i would like to know what you find if you try it,im thinking Mabe ending up in trans and red stuff getting diluted

if i fixed problem when finally back together ill post here so others will know how to fix ,it seems its more common than think just can't get anyone to say what's going on with these bikes