Servicing my ZX6R

Hi all, I have a question about the servicing of my '95 ZX6R... which now has 63,000km on the clock.
One mechanic told me that I should have it serviced every 6,000km, alternating major and minor services. Someone else told me the same interval but every third or fourth should be major...
How often do I need to have a 'major' service?
I am completely mechanically clueless so don't even really know the difference between the two.
Thanks for your help!

One mechanic told me that I should have it serviced every 6,000km, alternating major and minor services. Someone else told me the same interval but every third or fourth should be major...
How often do I need to have a 'major' service?
I am completely mechanically clueless so don't even really know the difference between the two.
Thanks for your help!
