01-11-11, 08:16 AM
Your problem is less the occasional 7k tacho error (indicating that the valve is just nipping up slightly until heat/vibes free it up) than the inevitable corrosion that will have seized the bolts solid by now.
Servicing the EXUP every minor service and reassembling with copper grease will stop the bolts from doing this. That's what's meant by 'preventative maintenance'.
In this case, fixing when broke is going to be more of a pain than it need have been.
Although the carrier element of copper grease burns off, the copper itself does help to keep the valve moving properly.
Mike
PS. Yamaha don't say you should service the EXUP every minor service. In fact, they don't mention the EXUP in the any of the service intervals which is utterly ludicrous!
Servicing the EXUP every minor service and reassembling with copper grease will stop the bolts from doing this. That's what's meant by 'preventative maintenance'.
In this case, fixing when broke is going to be more of a pain than it need have been.Although the carrier element of copper grease burns off, the copper itself does help to keep the valve moving properly.
Mike
PS. Yamaha don't say you should service the EXUP every minor service. In fact, they don't mention the EXUP in the any of the service intervals which is utterly ludicrous!