there are oem forks with 170mm travel u could check it by the serial no.on the back of your lower crown show this no.to your dealer or a mrz.mechanic he should tell u what kind is it.next thing to do is check oil level shoul be 220cc and inspeckt your lower bushings are they ok.i know a lot of theese forks so ill be glad to help
basically you bottomed out so hard that the oil has gone above the piston.
take your forks to a suspension / bike shop and ask for a service - they will open the forks up and find oil above the piston and then replace the oil and seals etc.