After 20 years out of the saddle, I bought a XR4 earlier this year, and absolutely loved getting back in the swing of things. I loved the tractor like torque, but the suspension let the old girl down. So I've just taken the plunge and bought a 2014 350 exc-f. Pick it up tomorrow I've read on these forums somewhere, maybe the CRF section, where they use Flashlube in the fuel to help valve recession. I've been running it in my sons 2012 WR250, so my question is.....Should I run it in my new bike? Will it affect the injector? Or is it a waste of time? Any input appreciated.