Fork oil change

SOURCE: front fork leaking oil from bottom of the seal.

This is one of the few things that I recommend you take to a shop - you need some very special tools and techniques to fix this problem. Sorry,
Kevin

SOURCE: fzr1000 fork oil

hello m8,,i had one of these babys,,grab your self a medium grade oil,, if u have a litre bottle u need to put just over a quarter of that bottle in each fork,, or if u have a 500ml bottle pour half a bottle in each fork,, cheers

SOURCE: fork oil capacity for yamaha 600 diversion

Hi,did my mates last week,used 350ml per leg.

SOURCE: YZ 250 F 2007 Fork oil level

how do i check my oil level on my yz 250

SOURCE: amount of oil in forks

The forks have to be bled correctly, then oil filled to the correct level by oil level (height) measurement. You need the service manual for your model if you are not familiar with the procedure. Since you asked the "amount" instead of "level" in millimeters - I assume you need the manual.