FYI, you are missing the nylon chain guide, p/n 501 51 72-01, from the clutch cover. It's probably missing from the crankcase as well, along with inner protection plate p/n 501 81 48-01, and bar guides 501 44 45-01 & 501 44 44-01. Since it's thrown the chain at lest once, chain catcher 501 68...