Quote:
Originally posted by phil_h
Desmo cams accelerate and decelerate the valve without help from a spring, so all the forces are transmitted to the cam drive, and if the nut is not doen up properly, it will allow a tiny bit of movement, which, when you ride, er, enthusiastically, as you have to on a 600, causes a tiny hammering effect, which can only get worse.
A good mechanic will notice this movement when they change the belts, but if corners have been cut, the movement will get worse faster. |
Thanks for that. i understand it a lot better now.
Its actually nice to have the head off to get a better idea of exactly what happens when it runs - im used to dealing with 2 stroke systems and less moving parts..
Odd thing.. the nut was tight. It was quite tough to get off today.
Although i got 5 years of service history with the bike, i have found (stupid) things where corners have been cut so anything is possible.
The belts were replaced back in september 05 as were some head internals (but im not sure which head).
Thanks again (to all) for being patient and answering all my Q's.
Cy