1. Oil sight glass - take 2 - your experience on fitting a new one on an older bike

    Hi all, I know this has been all over the internet, yet I need to clarify on one thing before I mess another sight glass up. From your experience - did you use any lubricant / sealant to help the sight glass slip / remain sealed on an older bike (namely R1150GS in this case)? Most sources say...

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