well i finally got around to changing my cvh35 to a cvh34 today
took the old cam out and inspected the cam for worn lobes, happens to be that cylinder 4 exhaust outlet lobe was completely shagged the follower was curved and had pieces missing from it the inlet lobes seemed to be ok but all the outlet ones were worn out.
just out of interest, could this have effected power from the engine in major way?