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888 at Last !!!
Posts: 957
Join Date: Jan 2002
Location: Horsham, West Sussex
is this once the bike has warmed up or just after start-up (and for about 10 mins)?
If it's on start-up, most 748-996 do this. Something to do with the oil taking longer to get to the rear cylinder. Hence all the advice to warm-up before moving off.
If all the time then could be something else. Mine does this on start-up but both pipes run clean after 10 mins or so.