Hi Thanks for all the replies.

Having given it alot of thought and due to the amount of oil being so little when you drain it into a container(a full drain tube amount) I have been running the bike for the last 2 days (160 miles) WITHOUT the rubber bung in place!

Yes you get a few drips after the engine is switched off but very little oil spillage during riding on the bike or rear tyre- infact less oil spillage than from the Lubeman chain oiler fitted to the rear sprocket area on the other side of the bike!

Is it Yamaha fitting the bung purely as a "green" solution as its not good to drop any oil into the ecostructure. is the air breather system big enough to cope and thats why you get oil in the drain tube?

Anyone got any comments or advice?

thanks
Stridey