the period of which the bike needs to be serviced by a qaulified mechanic ="which i am not" is what it has to do with it they stamp the service manual to say it has been done and if it hasnt they void the warranty.
I know it only has to be done every 16,000 kilometers but i like to do it every 8,000
now that i dont need the dealer stamp i will do it myself.
and Molinoman
As for cost i dont think im going to go broke by changing my oil more often it isnt that expensive