I'm sure it has been mentioned before in another thread but is their a list of parts replaced or work performed @ a 100,000km service?
My car is about to hit 93,000km and it's still driving as smoothly and beautifully as the day I picked it up (~55,000km) so im abit reluctant to go and spend $1,000 on labour/parts when it is quite possible that the speedo was "altered" before it even came to Australia (~3yrs ago) meaning my engine more than likely has already passed 100,000km (timing belt was changed at about 50,000km).
Normally with computers "If it aint broke, don't fix" however my R33 is hardling a $1,000 PC.