45mm marzocchi's OC leaking oil from rebound adjuster

Recently my 01 cr125 decided to cover me in fork oil without me knowing. It was spurting out around the rebound adjustment screw while i was riding. I have pulled the forks down and removed the rebound needle as i guessed this was where the problem was (i thought the O ring would be split allowing oil up the damper rod).

Turns out the O ring is intact but a loose fit in the damper rod. I also noticed there was no spring to push the rebound needle back down as in other open chamber forks.

So three questions:

1: Would that O ring be what could be causing the oil to come out around the rebound adjuster?

2: What size is the O ring that goes on the rebound needle?

3: Should there be a spring pushing the rebound needle back down?

Appreciate any help.

are you sure it's a 45 Marzocchi?

the cr125 of 01 comes standard with a 46 KYB

are you sure it's a 45 Marzocchi?

the cr125 of 01 comes standard with a 46 KYB

Yeah 45 marzocchi. It's on a Husqvarna cr125.

sorry, my bad. i usually think of a Honda by hearing CR125

1) can be the cause

2) about 3.70 x 1.70 mm

3) no

when pushing the needle up and down you should feel a clear resistance. If the needle moves very, very easily or fall out by itself, the o-ring is worn

and just to give you another option:

you can screw out the rebound adjuster screw.

On top of it there is an o-ring as well.

Could be very likely that that one is worn.

sorry, my bad. i usually think of a Honda by hearing CR125

1) can be the cause

2) about 3.70 x 1.70 mm

3) no

when pushing the needle up and down you should feel a clear resistance. If the needle moves very, very easily or fall out by itself, the o-ring is worn

The needle just falls out of mine. I measured my o ring. Looks like similar measurements to yours. Thanks for replying.

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