Look this all came about when I was assembling my engine after having the timing side bearing line bored. Normally when working on my bikes I take many photos for record purposes but I didn't record the alignment of the cam/idler/crank pinions
So after completing the restoration I have been trying to start the old girl, without success. I've checked all the usual, spark, timing etc and I've started to doubt my memory regarding the valve timing, hence the thread.
Having never check valve timing before, I didn't have a problem with valves opening, it was understanding if you measure valves closing or being closed. I'm now happy that that the pinions are aligned (now have a photo) and suspect the non starting is possibly fuel. Haven't touched the carb for 4 months, so it needs attention 🤯
Thanks for your time