Wooops,
time to start worrying then.
I drove my bike to work today and could hear the tappits clearly through my helmet.
The best way to describe the noise is as Lewis said, a metallic ticking, which, at about 4000 revs sounds almost like a metallic purr, except more pronounced.
So what are the causes Fred?
Worn valve stem tops as you said,
worn rockers, or do the valves need reseating?
What damage can this cause to the engine and how quickly?
Geoff
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