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8/17/2016
Location
Land O Lakes, FL
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rg478
12/28/2016 8:01am
12/28/2016 8:01am
Is anybody stocking springs yet for the 17 CRF450? Spoke to factory connection, they mentioned February and Race Tech doesn't have anything listed on their site either. Since these forks are supposedly the 49mm "A-kit"specs, would those springs work? Also need a shock spring, the shock looks completely different than previous models. Any help would be awesome!
You can ask Cannon if you can mail in a fork/shock spring so they can spec them if it's not on market yet. As of earlier this week , they had not gotten one yet.
That said, the fork springs are 44mm X 473mm and you can use the 2010-2013 YZ 450/2007-20012 KX 450 fork spring which is 44mm X 470mm. The spring seat is held on the cartridge by a circlip and they have a second circlip grove 3.5mm below the stock one, move the circlip to the lower groove and you effectively have 473.5mm
The Shop
The compression base valve uses a 40mm wrench/socket now instead of the 32mm they always use to use.
I'll probably roll out there lunchtime for an hour or so.
The top two are the '17 CRF and the bottom one is the '12YZ
If you can't make them, you can buy several different sized preload spacers here to get installed preload where you want it. http://www.suspensiondirect.com/shop/elite-parts/1-elite-fork-parts/d-s…
Pit Row
Several years back I had someone bring in CRF 250 forks sitting part way through the stroke. They had the local dealership install softer springs and they misread the catalog and installed 454mm yz springs instead of 460mm crf springs. Stock preload was 6mm so the YZ springs made it 0 and after a few weeks of riding the "looseness" at the top of the stroke eventually deformed the retaining collars and pushed them up over the circlips. Couldn't get the collars from Honda or Suspension Direct so eventually had to machine my own on my lathe to fix it, PITA!
The '17 CRF seems to have a good amount of static sag in the front and that's why I I'm curious to measure it this week. You would need to be sure you kept enough preload on the springs to securely hold the spring seat and retaining collar in place. Not as big of a deal with KYB because theirs are crimped in place over the circlip from the factory
Just got the springs in, these specs look a little different, you think it's still OK to use?
I don't use Race Tech springs so I don't have any to measure, but I have many sets of OEM KYB springs in different rates and they all are right on 470mm length and 44mm OD just like the KYB catalog states.
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