How many oil i must put in front fork of fmx 650

With the fork springs and spacers removed and the caps off, compress the fork leg all the way down, then fill each leg 6 inches from the top.

Semi-Synthetic, 10w-40
the location you might try the auto parts store where you go to buy the oil.

Adjust the master cylinder piston rod longer or shorter thats it, longer rod less travel. !!!!

Fork oil #10 is 570ml amount or 129mm level for each leg.
Cheers!

The best way,is to drain a fork leg into a container, and measure the amount. however if you cant do that, start of with about 100ml in each leg, test them out, if to soft, you can always add a little more oil. from memory, a 250ml bottle of fork oil was enough to do both legs on most bikes.

Your owners manual will help if you have one. There used to be drain plugs under each fork. The air valves help suspension smoothen the rides more.

hi m8 ,to give u a rough guide,or a maths lesson,,lol,,if u get a half litre bottle, pour half of that bottle in each leg,that is usualy the amount,, or if u can only get 1 litre bottles,, pour a quart in each leg,, leaving u half a litre left,, hope this makes sense ,, if to soft wen you hit the front brake,,then add about 4 egg cup fulls in each leg,,cheers