Don't know much about Harleys but most Japanese sportbikes are higher compression and run at closer tolerances. My 919 uses the 900rr sportbike engine that's bullet proof. Even after my break in procedure (taken it easy on rpms, riding at different rpms in lower range, etc. -see any cycleforums or other motorcycle thread invloving breakin) My first oil change showed metal shavings from crankcase. I would NOT want to be going 'balls to the wall' with that in there. Because of my personal history with new sportbikes, I don't consider it a myth. Dunno about cars.
My 2 cents,
p.s. at least this isn't a genI/II vs genIII thread! lol
chuckdoc
My 2 cents,
p.s. at least this isn't a genI/II vs genIII thread! lol
chuckdoc