When I run a new engine in, I keep the revs down and to keep to 50 mph for 500 miles, oil change, adjust valves [they seem to tighten up]. I do the same till Ive done 1500 miles and then go back to usual service periods, it seems to work for me . :wink:
The Wilson rebuild book advocates a mid range (2k-3k RPM) initial run of 20mins or so to bed in or harden the cam and I think the cam followers. I have also seen this on thesamba etc.. The higher (than idle)revs I think ensure better oil splash onto the relevent faces.
As for the rings Wilson advocates varying the rpm during run in but without going to full throttle .
Just drive it, try not to over rev it much and don't let it labour,50 miles or so change oil and clean gauze to get rid of the shite,adjusr tappets,check for oil leaks etc.Another few hundred miles,change oil,another 500 or so change oil again then 1000,then normally after that.
ive just ran a newie in ,i opted for the 500 miles at 50 ish then change oil set tapets and check timing,.the oil was jet black after 500 so mabee do it sooner