If they are like the Z setup from memory then although called it item 6 isn't an oil seal, it's more like a ribbed rubber seal with no spring retaining a lip like a conventional oil seal.

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2011 xt660z.
Yoshimura cans ,kev mod,Dna 2, Stahlkoffer panniers,Hepco Becker box,Givi crash bars,Mita e07 tyres.