I'm [retty sure you need that. It fits on the top of the gear box behind the clutch basket. its either for the kick starter or waterpump I think. Yes, it uses two o-rings.
_________________
james
Its not how fast you go...Its how you go fast.
MC21 Rothmans
RS250
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748R
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http://members.rennlist.com/j911brick/rennlist3_002.htm