[dracko]

Thanks for all the replies and advice.

To confirm it’s not rocker arm/nut related I think I’ll swap arms with #4 cylinder and see if it remains.

I don’t believe the nut has lost its locking ability because it’s only ever been set the one time (like all of them) and it doesn’t back off at all. The clacking doesn’t go away and then return after adjusting...it’s always there. Only time it isn’t making the noise is if I put downward pressure with a socket on the locknut essentially collapsing the lifter more?

In regards to VR1, that stuff is the best. I run it in my old triumph mc and it seems to do a great job. What viscosity are you running?

I wondered if the stud had pulled loose a tad but is the same height as the rest.
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