yush, wud be a lil more useful to see the actual model :x
Silloutte looks okay, proportionaly its very nice, but some reason the pelvis looks a little too big, but scince i cant tell where the crotch ends and where his jacket starts I could be wrong. Only thing i can really crit, is the hands look very unatural, palms should be like a curved truncated box rather than straight parallel edges if you get what i mean, here's a few hand studies i did a while ago:
http://img.photobucket.com/albums/v148/davidskiwan/sketchbook24Medium.jpg see how the knuckles are like a bridge and there's a hollowness in the palm? thats what i think you're hands are missing, also take note of how wrists look, imo they're too small atm. If you hold your hand out in that position it wud be flatter on top (the wrist should actually jut up slightly because of the bone shape) from the wrist to the fingers with a rounder palm underneath particulary the pad/base of the thumb.
Keep it up man, I wud say its one of the best naruto models ive seen, but cuz its a silloutte its hard to judge at this point.