=D> JUST BOUGHT THESE BRAND NEW FROM MR KAWASAKI IN JAPAN..GENUINE NEW ITEM AND SPENT COLD AND DARK NIGHTS GETTING TO MATCH AND FLOW RIGHT..AND OF COURSE POLISH
you have far too much time on your hands...
what flowing did you do cos i still see the casting marks in the hole?
on a standard 1s valve the hole is already a bit big to allow for tolerances in casting and shape of the cylinder port..