look at them pictures of the tuned ports on a cylinder then look at his, only the bridges on his are toutched so probly done them his sen, painted it black and put some ss fastners with it claiming it to be gold dust
Norfe, From the link you sent, It either looks like he also polished the exhaust port, Or maybe the tuned one is just cleaner than the other,
And he might have taken 0,5-1mm upwards on the exhaust valve without we being able to see it on the pics tough, Idk if its normal to just lift the ports 1 mm tough. How much do you usually lift them ?? xD