Have a read of this, i can't be arsed to fight my corner again.
I personally highly recommend it, whereas other people, not one who has actually tried it themselves i might add, say there's no need.
Totally up to you, it's your bike so your choice!
Can i just add though, if you're considering it, do it now while you've got fresh oil in the bike, so that you're not pouring it in then taking it out again in the near future.
http://foc-u.co.uk/index.php/topic,6291.0.html
I personally highly recommend it, whereas other people, not one who has actually tried it themselves i might add, say there's no need.
Totally up to you, it's your bike so your choice!

Can i just add though, if you're considering it, do it now while you've got fresh oil in the bike, so that you're not pouring it in then taking it out again in the near future.
http://foc-u.co.uk/index.php/topic,6291.0.html
More people are born because of alcohol than will ever die from it.