More cam probs

[lowlux]

well i got the cams in fine, BUT! i think my bro has picked up some of the "things that hold the cam down" i cant remember what there called right now, but yeah so once ive put the gears on and lined everything up there really hard to turn, so im thinking some of them must be in the wrong place, would this cause them not to turn easily? Also to put the belt on do u need to take the balancer off,cause i got it on without doing that buy lineing up the gears and putting the belt on then easing on the gear,which ended up going on really good,but still its too hard to turn the cams, can some1 please help as this is the first time ive done this