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Discussion Starter #1
I set the sag on my 07 this weekend (stock parts – 30 mm) in preparation for an upcoming track day and found that I had to dial the preload in to the very last line up front. The shock out back still had a good bit of adjustment left in her. I assume this means I need stiffer springs up front for my weight.

Does anyone know what the stock springs are rated at and where I can find reasonably priced upgraded springs? I would love to do the whole Ohlins thing but that is a lot of $$ to drop and I am actually rather satisfied with the stock setup (though I have never ridden on Ohlins before).

I assume I am not hurting anything by having it dialed almost all the way in but I would like to have a bit more adjustability should I want more preload up front.
 

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Somethings ounds odd. The oem rear spring is much lighter than the fronts. You "should" need a rear also is the fronts need that much preload.

But to answer your question, yes, you need springs. You won't hurt anything running full preload but will get a harsh ride. Springs run about $100 a set and install is pretty simple.
 

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Discussion Starter #3
I just rebuilt the shocks with 5w oil. Aside from that it's all stock. Where can I get the springs? Any idea what the stock spring rate is so I know where to go for the replacements?
 

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Discussion Starter #5
racetech has OEM spring rates on their website.
Thanks. Looks like the stock rate is about right for my weight according to their website?

Stock Fork Spring Rate: 1.000 kg/mm (stock)
 

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Discussion Starter #8
Thanks for your input all. I am heading to the track soon which is why I am trying to get everything set up right now. Hopefully we will get a few more warm weekends soon for me to dial it in.
 

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Thanks. Looks like the stock rate is about right for my weight according to their website?

Stock Fork Spring Rate: 1.000 kg/mm (stock)
race techs site is often incorrect related to stock rates. Second gens are more like .9 stock. The rear shock is even softer and pretty much a POS.
 

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race techs site is often incorrect related to stock rates. Second gens are more like .9 stock. The rear shock is even softer and pretty much a POS.
+1 Also if you bring your speng to a spuspension guy they can measure the actual rate. They often varry from what they are marked.

I went to 1.0's when I installed the AK20's. (220lbs w/o gear)

And +1 to Traxxion.
 
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