98 YZ400 new to me and Forks are sagging

4 replies to this topic
  • Apgar1

Posted November 02, 2010 - 05:40 PM


I got a 98 YZ400 for $900. It is a beast and i love it. I believe it to have been raced and set up well but neglected in recent years. I am 240lbs and the springs are a little soft. I ride mostly in tight woods ans single track but do jump it whenever i get to. The forks have about 2.5-3 inches of sag without me on the bike.

What caused this and how do i fix it in a cheap way?

Also, what should i do as far as preventive maitnence?

I change oil and clean/change filter every 2 rides and have already dealt with the drive chain adjusters. I sometimes hear a click in it when i crack it open at lower RPM.

  • grayracer513

Posted November 02, 2010 - 06:53 PM


What caused this and how do i fix it in a cheap way?

Replace the springs. Front and rear. The original springs were too soft for you when they were new.

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  • Apgar1

Posted November 02, 2010 - 07:23 PM


What causes the sag without me on the bike? Are the springs just worn or is there another problem?

  • grayracer513

Posted November 03, 2010 - 06:51 AM


It's supposed to sag under its own weight, just not that much. The springs are to blame for it. Don't replace them with the original stock spring rates.

  • bluethumper98

Posted November 03, 2010 - 07:42 AM


I am 230, cleared a double and landed long on mine and I thought I broke the bike in half, the springs are definetely soft on these.

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