1991 kdx250 fork seal questions

[Matt90GT]

Got out riding again today now about the 3rd or 4th ride on the bike after getting everything dialed in. Well last week everything was fine, even jumping off a 5-6foot loading dock.

Well today, looks like a blew both fork seals. They are 4 rides old. They were fine most of the day and the last hour we spent jumping. I nose dived a jump and look at that in the video, I can see that is the start of where they were leaking. Now there was a lot of air built up in the forks which I bleed off when I got home.

do you think the seals will seal now that the air is out of the forks? or is something not installed right, bad seals or what?

I ran the 5w amsoil suspension fluid 4.5" from the top. The owners manual they recommend a level of 2.76". Would to much air cause that problem?

Thanks

 

[dirt bike dave]

Matt,
Many times a leaky seal is caused by a particle of grit that has been forced between the lip and the slider. Pressure washing can contribute to this.

Before replacing the seals or trying drastic measures, take a business card or a 35mm strip of film and slide it between the seal and the tube. Slide it in deep, past the dust seal and down to the oil seal. If there is a particle in there, this will usually knock it loose.

 

[Matt90GT]

will try. Thanks dave.