UPDATING KX500 SUSPENSION.

[Zerofear66]

Generally speaking, the Chrome diameter follows the outside clamping diameters.
IF that is true, the seals for the chrome tube 17D-23145-00-00 fit 2010-2016 YZ250F and YZ450F so it stands to reason that 10-16 would all bolt right up.
However, the only year I have actually measured is the 2013's and... the 2006 YZ450F.
What you need is something close to the following: UPPER 53.8MM - LOWER 58.9MM
The 2006 UPPER 55.82MM - LOWER 59.06
Or, .080" difference between the upper KX500 and the 06 YZ450F forks
The lower is .006" difference.

If anybody has some of the in between years please feel free to share your clamping diameters.

That's GREAT news! Thanks for the info. I love that SSS fork.

[Sandblaster]

They are nice...
Although Sean Collier likes his KX450F front end that we built for his KX500.
So the big issue for me is getting the right valving and spring rate for your riding ability and ride conditions.

[Zerofear66]

They are nice...
Although Sean Collier likes his KX450F front end that we built for his KX500.
So the big issue for me is getting the right valving and spring rate for your riding ability and ride conditions.

Ive used Smart Performance in the past with my SSS suspension and I could not believe how plush and progressive that fork was. Small chop, braking bumps etc were no issue. I felt like I was riding on a pillow lol.
One time I shorted a triple and landed nose down into the peak of the third, I was already looking for a spot to step off when I hit. The fork absorbed the hit without pitching me off and I rode it out. Ive been a fan since lol.
Im just stoked the fork will slide into the stock triple!

[Sandblaster]

Post some pics of your bike.
We'd like to see it.

[Zerofear66]

Post some pics of your bike.
We'd like to see it.


She's being shipped to me this month. 2001, I found her with a stuck piston. Ill post pics when she gets to me.

[Sandblaster]

Excellent!

[Tlang]

Will a 2009 kx250f set up work the same as the '07?

[Sandblaster]

The 06-12 KX250f forks are all the same clamping diameters.
They are about 1mm smaller then the 450f forks or the 04-05 and 13 and newer KX250F forks.

There are two ways that guys use these..
Either method uses the 97-04 KX500 triple clamp, or the KX450F triples with a different steering stem pressed in from Emig Racing.

1. Put the 250f forks in the triples and just clamp them down...
2. Get some .020" aluminum material (Beer can) and shim the forks where they clamp.

I have never tried either method but have multiple reports that others have made them work.

[Tlang]

Ok thank you.

[moto939]

Hey guys, great site.

Just some info...SSS forks and clamps

All have 59mm lower clamping surface

'06-'09 450f 56mm top

'10- current 450f 54mm top

'06-'12 250f 56mm top

'13-current 250f 54mm top

two strokes 56mm top

Hope this helps anyone planning a fork swap.

I'm installing new '09 450f forks on a '01 500. Needed to machine out the stock KX top clamp to 56mm to fit these forks.

I'll post some pics when I figure it out.