The Crf cam is definitely "peaky", and your right, lots of clutch. With that and 04/05 Hrc cams I like to leave my idle a little higher than most people. Tends to reduce stalling a little bit, and help with restarts. The "starting procedure" with 04/05 carbs I found that worked best was 2 full pumps of the throttle, kick,2 pumps kick. Hot starting is always a gamble, but the hot start lever is a must! I know the Fcr's make more power but I tend to prefer the 04/5 carbs for the smoother roll on. I have this Fcr left over from the hybrid so its getting used, Im counting on the cam and high compression to get that instant throttle response. If you couple the Crf or Fcr cam with a Crf Fcr, it tends to have alot of 2 stroke feel. Guess we will see how it does, I have plenty of back up parts for different combo's.
I didnt lower the sub, and havent tried one yet, really want to though. I know on the 04/5 subs there are slugs at the bottom mounts that have to be removed then reinstalled after cutting or fab up new ones. Not sure how the 06^ are, Ive only had one 06^, an 07 with full TT motor. I prefer the earlier motors better, but everyone else I know likes the later ones