fork oil

hi, does anyone have info as to how many oz. of oil it takes to refill the forks on a 1980 kz1000LTD B4? Measuring the oil in the tubes is a pain, specially when trying to measure down to 1/16's of an inch!!And i want to get it right,,i just put new progressive springs in it. thanks for your time. JT. Rindge. NH

about 180-188cc if they are bone dry or about 160cc if you are just changing it in a kz,ltd should be fairly close.im a big fan of 20-30w synthetic motor oil myself but thats just my approach

how many ounces is that? i am going to put some progressive springs in,, where i got them from told me to go 15w, any more would reult in a harsh ride. JT