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djo269

suspension springs transferred from 250f to 450f

8 posts in this topic

I have a 2002 yamaha yz250f that I bought aftermarket springs for .52 front and a 6.6 rear. Could I put those springs on a 2003 yz450f?

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does anyone know for sure on this. i just bought a 2003 yz450f and need to get it set-up soon so i can start getting used to it.

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They will fit. You must be a big dude.

Yeah, I agree. I am 220 without gear and I have a .48 front and 6.0 rear and the rear overpowers the front. I need to get a 5.6 like Race Tech 's website recommends. Not sure why the suspension guy who installed the springs went with them.

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Yeah, I agree. I am 220 without gear and I have a .48 front and 6.0 rear and the rear overpowers the front. I need to get a 5.6 like Race Tech 's website recommends. Not sure why the suspension guy who installed the springs went with them.

I'm 190 (now and then) without gear. Mine also has .48 fronts, but with a 5.8 rear. The rear is just about right, according to the way the sag sets up, but I've always wondered about the front. I have the stock .46's, maybe I'll try them.

Talk about a hijack. :applause:

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Wow, 185 and a 5.8! I'm 240 and just bought a 5.7, Racetech said 5.74 for trails.

Lukejt

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I went by the procedure laid out in these two articles, and according to that, the rear spring rate is correct for my weight when I'm ready to ride.

Setting Race Sag (Do first)

Using Stait Sag to Check the Spring Rate

I've seen several posts that claim the Race Tech calculator yields excessively light rates. Somebody's wrong.

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Thanks, I got the 5.7 for $20 on Ebay so no big loss, it's a Racetech. I'm going to install it before the weekend and I will set the sag and check the numbers.

Lukejt

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