when i rebuilt the xs I put mineral oil in and rode like I stole it. dropped the oil after 20 miles and filled with semi-synth. this theory is the bores get bedded in and this worked really well. the only caveat was that i reused the good parts so essentially, they had their "edges" knocked off and I could do that.
with a totally brand new bike, you got all that broken off shite lurking in the gearbox etc and cane-ing it won't do the bike much good recirculating it around the engine.
I'd drop the oil and put new in and then think about giving it some