Originally Posted by S. Scapes
I use fs90r's and they work great for me. I have never adjusted the valves and never really needed to. I don't have much experience with the other brands but if you're set on stihl, the 90r is a great investment and a big upgrade from the TB.
i've always been a stihl fan. i guess because when my dad had his rental business, thats all he sold....and thats pretty much all i serviced.