Anyone installed this,,, http://www.ktmtwins.com/factory-ktm-950 ... ng-upgrade

No, but have used their kits on other bikes (and might as well get it direct from Factory Pro) - usually with significant improvement.

Please note that Factory Pro indicates two different springs for the LC8, dependent on bike model (950 v. 990 - I do not know if they are actually different):

http://www.factorypro.com/Prod_Pages/indexmake.html#KTM

I also don't know if a spring alone would make a huge difference, hard to say without trying one ... And to think I just did some clutch service a few weeks ago ... Oh well ...

My bikes shifting is a bit sloppy. Thanks for posting, will pick one up...

I picked one up but haven't installed it yet. I was planning to install it with my WP rebuild but the spring came in a month after the WP parts. The spring upgrade was a big improvement on some other twins (first gen SV650, RC51) I had so I figured I'd try it. But after an oil change and complete refreshening of my SD the shifting is back to where I think it should be.

I think over the winter I'll get it installed.