Some of them came with TI , thinking the Exhaust valves only, unless I'm thinking the '01 426's . It was common for those to have short life and most replaced with the steel versions.
Service intervals really only need to be done by how a bike is used. Someone not revving the crap out of it running high rpms all the time can go to more "normal" specs. 500km I would guess is for racing and I've never known anyone to follow that close. 2000- 3000km is more like it and that's even getting short personally.
Last edited by jjrider; 11 Apr 2017 at 22:57.
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