XR400 fork springs?

11 replies to this topic
  • ob1quixote

Posted October 28, 2004 - 05:47 AM


Anyone have some .47-.50kg fork springs gathering dust?

Robert :cry:

  • lucky_logger6

Posted October 28, 2004 - 07:08 AM


Is that the stock rate...What is the stock rate?

  • ob1quixote

Posted October 28, 2004 - 07:48 AM


Thats not stock, well above. Stock is .39kg, if my memory is correct.

Robert :cry:

  • superslyko

Posted October 28, 2004 - 08:41 AM



I just put the .48 kg on my ride. $100 bucks at Race Tech. :cry: They do have them at the Thumpertalk store a little cheaper...... :cry:

Great mod. since I'm tipping the scales at 265 lbs. :cry:

  • xrMike

Posted October 28, 2004 - 10:36 AM


Thats not stock, well above. Stock is .39kg, if my memory is correct.

I think they increased the spring rate one year, but I don't remember which year it was... I have a 2000, and I THINK the stockers were .42, but I'm not actually sure...

I think Kevin knows the answer to all these questions; he posted a list once of all the little changes they made each year, from about '95 to present... That list should be made into a sticky...

  • skipn8r

Posted October 28, 2004 - 11:25 AM


According to the White Brothers suspension catalog (pg 104), '96 - '99 XR400 is 0.38 kg/mm and '00 - present is 0.41 kg/mm :cry:.

Visit the ThumperTalk Store for the lowest prices on motorcycle / ATV parts and accessories - Guaranteed
  • lucky_logger6

Posted October 28, 2004 - 09:09 PM


I was recommended to get the .52kg springs for my 400, to “balance the bike”. I guess that .52 springs will match the rear shock? I weigh 160, does that sound like the right spring for me? Any help would be great!

  • ob1quixote

Posted October 29, 2004 - 04:30 AM


I was told 49-52KG, and I weigh 260, so someone has been told wrong.......... I got my info from the chart at 4strokes.com

Robert :cry:

  • skipn8r

Posted October 29, 2004 - 06:18 AM


I also weigh around 160, and I've found that around 8.5 - 9.0 kg/mm for the shock and 0.41 - 0.43 kg/mm for the fork seem to work well. Stock rates are shown above. Spring rate suggestions can be found here and here. Make sure you set your sag. I tend to prefer something in the range of 90 - 95 mm race sag on my '99 XR4.

  • codydog

Posted October 30, 2004 - 04:45 AM


I'm also interested if anybody has a set of fork springs collecting dust. Would like to find a set of the .41's from a '00 and newer.

  • Ed@Ford

Posted October 31, 2004 - 06:14 PM


Likewise...does anyone have a set of the stock 96-99 springs, 0.39 rate....that are still close to the original 510 mm free length? email me at ed.king@avlna.com

  • ob1quixote

Posted October 31, 2004 - 06:18 PM


As soon as I find some HD springs, mine '98s will be available!

Robert :cry:

Related Content


Craigslist xr250r Starting Trouble by Denverxr250r

Dirt Bike   Make / Model Specific   Honda   XR250/400
  • 21 replies

Too Much Throttle Response After CCC Mods by Rodeojones

Dirt Bike   Make / Model Specific   Honda   CRF250X
  • Hot  63 replies

XR400 Rebuild (Partial) by BluntMachete

Dirt Bike   Make / Model Specific   Honda   XR250/400
  • * * * * *
  • 5 replies

XR400 - Will I have problems with 440 Big Bore Kit and Hot Cam Stage 1? by jallangreen

Dirt Bike   Make / Model Specific   Honda   XR250/400
  • 14 replies

XR400 Supermoto! by diesel matt

Dirt Bike   General Dirt Bike Forums   Dirt Bike Pictures & Video
  • 2 replies

Join Our Community!

Even if you don't want to post, registered members get access to tools that make finding & following the good stuff easier.

If you enjoyed reading about "" here in the ThumperTalk archive, you'll LOVE our community. Come join ThumperTalk today!

The views and opinions expressed on this page are strictly those of the author, and have not been reviewed or approved by ThumperTalk.