Fork interchange and suggestion


4 replies to this topic
  • pscook

Posted September 06, 2011 - 09:20 AM

#1

I really want to take advantage of newer technology on my 426. I have read that 2006 triples will bolt directly to the steel 426 frame with very little issues. I also know that the 2006 forks have an offset on the axle lug to compensate for the wider triple clamps. Here's my question- What year/model (250, 450 or ?) will slide into the 2006 triple clamps? What is the better year forks? I have read that the 2007 forks are better than 2004-2006, which is better than my forks, but the data stops there and I don't know if 2008 and on are better, or if they even fit 2006 clamps. Spacers are an easy fix, but any brake system changes may cause fiduciary consternation (I'm cheap).

Any information or suggestions would be appreciated. Oh, last question- My 426 is a 2002 model, and I understand that 450 shocks are the same up to a certain point (within a couple of mm's). What year stock 450 shock is the best?

  • grayracer513

Posted September 06, 2011 - 11:21 AM

#2

What year/model (250, 450 or ?) will slide into the 2006 triple clamps?

2006 forks are the only ones that correctly fit the '06 clamps. If you want to use '07 forks, use '07 clamps. They will fit your frame the same as the '06 does.

What is the better year forks? I have read that the 2007 forks are better than 2004-2006, which is better than my forks, but the data stops there and I don't know if 2008 and on are better, or if they even fit 2006 clamps.

'08 and later forks require the use of the complete front brake system from an '08 or later. The '07 was not significantly different from the '06 except for outer tube diameters and valving. Either one is a very good fork. The '04 fork was a 48mm version of the same fork you have now, and the '05 was the first twin chamber KYB fork; good if you rework them, but they need work. Stay with the '06 or '07.

What year stock 450 shock is the best?

'05-'08 was one version, the '08-'09 was slightly refined and slightly longer. Either of them can be set up to work extremely well.

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

Posted September 06, 2011 - 12:11 PM

#3

Thanks, Gray. Any cross-pollination between 250 and 450? A complete set of 2007 250 forks went for $200 on ebay last night, but I wasn't sure if the 250 and 450 had the same generational changes or if the 250 forks would fit my application. Also, I read somewhere that the offset was reduced with the 2008 triple clamps, or was that simply moving the axle aft by 1 mm? Any chance of pressing in the proper stem and using the 2008 triple clamp for 2007 forks?

  • grayracer513

Posted September 06, 2011 - 01:51 PM

#4

The 250F fork is, I believe, about 12mm shorter, which can monkey with your front end geometry. The 250 2T fork is generationally identical year to year, but may be of a different length, not really certain. They would certainly have the wrong springs and valving for your 426, so unless you plan to address that during the swap, pass.

  • pscook

Posted September 06, 2011 - 02:22 PM

#5

Gotcha, thanks. Now to pinch those pennies even harder...





Related Content

Forums
Photo

James Stewart back on a YZ450F by YamaLink


Dirt Bike   Special Interest Forums   Pro Racing
  • Hot  47 replies
Forums
Photo

YZ450F 03 Sparks driving me crazy by SirAttard


Dirt Bike   Make / Model Specific   Yamaha   YZ 400/426/450
  • 5 replies
Reviews

Yamaha YZ450F 2017 by Chris.GVS


Yamaha YZ450F 2017
  • - - - - -
  • 0 reviews
Forums
Photo

Snake pit oct 30th by The Anvil


Dirt Bike   Dirt Bike Regional Discussion   California
  • Hot  293 replies
Forums
Photo

100 hrs on 2014 yz450f, shim valves or replace them? by ttr230rider6


Dirt Bike   Make / Model Specific   Yamaha   YZ 400/426/450
  • Hot  79 replies
 
x

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.