I am not an expert,but as I learn from UHE,almost everyone here uses dual springs for valves on their bergs for better durabillity and performance because there are lot of valve spring failours.There is two dual valve sping kits available.One is Dales Lineaweaver and the other kit you can use is from a ktm 450 SX OEM 03-06 or aftermarket from kibblewhite.The sx 450 kit,need some modify to cylinder head to avoid get contact with it.Read the topic for dual valve spring kit at http://husaberg.org/index.php? name=PNphpBB2&file=viewtopic&t=6893&start=0&postdays=0&postorder=asc&highlight=dual&sid=88499149129c181149d93f34e427f3e1
Also check the owners dock you can find precious informations there! :wink:
You can get to contact with Dale Lineaweaver at www.d-lineaweaver.com
Also you can search on ebay.com , righting "ktm 450 sx kibblewhite spring kit"
Now if you like to buy the OEM springs ,some dealers from UHE will be pleased to help you with their services i think.
I dont think that you receive the valve springs before weekend,I wish I will rong
That was the first place I went, called about a dozen dealers but no luck with having them in stock. They were all very helpful some even giving me numbers to other dealers to try.