Steven.Carter wrote:Looks a bit flat to be anything from a pushrod. To me it looks like the flat bit on the rocker that's pushed down by the valve lifter.
What made me think of the pushrods was that it is cup shaped, about the right size, and it's polished inside...
paul.jameson wrote:If it is part of a pushrod, or the flat bit off the exhaust rocker, how did it get into the sump?
Well, to be honest Paul, it was in the roasting tin I was using under the bike. It could easily have come from the timing chest.
roger.fellows wrote:What's the chance it was 'lodged' somewhere on the bike and fell in? Is it cast? Can't quite see if it's got a broken edge all the way round.
It's got two broken edges and a machined beveled edge; the outside of the cup (the bit you can't see) is not polished, just a dark bare metal.
Having convinced myself, and attempted to convince you all that it was bit of pushrod cup, I can't see that the engine would run for long before the rocker bounced out. I drove it for a couple of miles yesterday and it pulls like a train. Well, a small train maybe, O gauge. Not like my SQ4, but it goes pretty well!