Change the above from mls to kms you and you'd be about right for a cagiva.
However, it all depends on just how you ride it. Key walshe managed 30,000km without an rebuild.
Others manage 5,000km.
Planning on stripping my topend and it's only had ~3000km, but it lives on the redline and makes more power than most.
Other plan of action is to leave them until they complain and fork out money when they need it.