Ummmmmm.......
Try taking the plugs out and the pipes off and turning it over on the starter to see if you can push it out.
At your risk. Of course...if it goes horribly wrong ....it's not my fault!
If it make you feel better, I was once doing an oil change on my 748SP when a small stone fell out of the fairing and into oil the filler hole. Italia took the **** out of me for weeks after that and that little episode cost me about £400!
[Edited on 13-1-2006 by twpd]