I have a Tbird on an 03 plate (11000 mls),it developed an oil leak from behind the front spocket cover,Triumph changed the clutch push rod,push rod seal,gear change oil seal still leaked so the crankcase breather seal was changed which i was told was the problem yes you got it still leaked,after all this I noticed myself that the breather pipe was pinched almost flat where it passes through a small space so back to Triumph who cleaned out the pipe and said all should be ok.On short journeys no leak now but on a longer run on the motorway it leaked just a little,Triumph did say that oil had been drawn into the airbox.Anyone got any ideas? please email me if you have. thanks