I noticed someone mentioned that the K series was actually lighter than the B series motors and I tried searching for the validity of this but couldn't find anything. I am just curious and it's bugging me b/c i can't find any real data. Does anyone know anything about this? If the whole K series set-up is in fact lighter to begin with than a B series set-up (stock vs stock) then it would just be another feather in the cap for the K series.